International Journal of Multiphase Flow最新文献

{"title":"Simulations for the interfacial waves in air-water annular flow in upward inclined tubes","authors":"Xin Zhang ,&nbsp;Jianxin Shi ,&nbsp;Baozhi Sun ,&nbsp;Wanze Wu ,&nbsp;Pingtuan Wang","doi":"10.1016/j.ijmultiphaseflow.2025.105228","DOIUrl":"10.1016/j.ijmultiphaseflow.2025.105228","url":null,"abstract":"<div><div>A numerical model is developed using the <em>interIsoFoam</em> solver within the OpenFOAM-v2106 framework to investigate gas-liquid two-phase annular flow in inclined tubes, with a specific focus on upward flow at five different inclination angles. The tube, which is 700 mm long with an inner diameter of 11.7 mm. The working fluid consists of air and water at atmospheric pressure, with the gas phase exhibiting a superficial velocity of 18 m/s, and the liquid film characterized by a liquid film Reynolds number (<em>Re_f</em>) of 350. Near the inlet, high-frequency, low-amplitude initial waves are present. As the flow develops, these waves evolve into slower ripples at the top of the tube, particularly in the horizontal tube. Meanwhile, at the bottom, they transition into high-amplitude disturbance waves. This progression reflects the distinct evolution of wave types at the top and bottom as the flow progresses. The base liquid film thickness and interfacial wave amplitude in the inclined tube exhibit pronounced circumferential non-uniformity, with both decreasing gradually from the top to the bottom. This non-uniformity becomes more pronounced as the inclination angle decreases. An edge detection algorithm is used to identify the characteristic lines of ripple and disturbance waves, aiding in the investigation of circumferential wave velocity variations within the tube.</div></div>","PeriodicalId":339,"journal":{"name":"International Journal of Multiphase Flow","volume":"188 ","pages":"Article 105228"},"PeriodicalIF":3.6,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143767760","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"High-efficiency microreactor design for hydrogen peroxide decomposition: impact of concentration and flow rate on two-phase flow instability and conversion","authors":"Xinran Ye ,&nbsp;Zan Wu ,&nbsp;Haiou Wang ,&nbsp;Jianren Fan ,&nbsp;Kun Luo","doi":"10.1016/j.ijmultiphaseflow.2025.105229","DOIUrl":"10.1016/j.ijmultiphaseflow.2025.105229","url":null,"abstract":"<div><div>Microreactors have been widely applied in various fields involving gas-liquid two-phase reactions. However, there is still a need to achieve stable and high conversion rates in microreactors because the complex interactions between the gas and liquid phases can lead to unstable flow patterns, resulting in inefficient mass transport and reduced conversion rates. This work designs a novel radial channel microreactor for hydrogen peroxide decomposition. By integrating fast Fourier transform (FFT) and wavelet transform (WT) methods for time-frequency analysis with visual experiments, this study reveals the impact of reactant flow rate and concentration on flow instability, as well as flow pattern transitions. The radial channel reactor attains a conversion level that remains unaffected by variations in reactant flow rate by employing periodic flow pattern transitions when using 3 wt.% H₂O₂. In the case with 10 wt.% and the case with 30 wt.% H₂O₂, the radial channel reactor can stabilize the flow pattern transition to achieve a high conversion. The highest conversion rate for H₂O₂ decomposition is 92.7 % in the case with 30 wt.% H₂O₂, surpassing the previously reported values in the literature. Through multiple linear regression (MLR) method, a predictive model is proposed and helps to elucidate the effects of reactant flow rate and concentration. This work proves an improved reactor design to utilize and alleviate two-phase flow instability can enhance reactor performance and achieve high conversion rates.</div></div>","PeriodicalId":339,"journal":{"name":"International Journal of Multiphase Flow","volume":"188 ","pages":"Article 105229"},"PeriodicalIF":3.6,"publicationDate":"2025-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143724102","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"On the interaction of a cavitation bubble with an carbon fiber composite elastic plate","authors":"Lei Han,&nbsp;Jiacheng Chen,&nbsp;Ruiquan Zhou,&nbsp;Mindi Zhang,&nbsp;Biao Huang,&nbsp;CLEO Collaboration","doi":"10.1016/j.ijmultiphaseflow.2025.105203","DOIUrl":"10.1016/j.ijmultiphaseflow.2025.105203","url":null,"abstract":"<div><div>We experimentally and numerically investigated the interaction between a spark-induced bubble and an elastic plate. We focused on the bubble dynamics and plate deformation, which influenced by different boundary thickness <em>h</em> (<span><math><mrow><mn>0</mn><mo>.</mo><mn>5</mn><mo>&lt;</mo></mrow></math></span> <em>h</em> <span><math><mrow><mo>&lt;</mo><mn>2</mn><mo>.</mo><mn>0</mn><mspace></mspace><mi>mm</mi></mrow></math></span>) and initial stand-off distance <span><math><mi>γ</mi></math></span> (<span><math><mrow><mn>0</mn><mo>.</mo><mn>5</mn><mo>&lt;</mo><mi>γ</mi><mo>&lt;</mo><mn>2</mn><mo>.</mo><mn>0</mn></mrow></math></span>). The elastic plate is made of carbon fiber layers, attached to a gum base of 0.1 mm thickness. A transient cavitation bubble generated by the fast electric discharge between two immersed electrodes, and the bubble maximum radius is 20 mm. We used high-speed camera to capture the bubble motion and the boundary motion at the simultaneously. We also conducted numerical simulations with the immersed boundary method, taking into account fluid compressibility and the boundary motion. The research results demonstrate that the amplitude of plate deformation directly affects the dynamic behavior of the bubble. The plate deformation along vertical direction is periodic in time, and the difference between the free end and the center (<span><math><mi>λ</mi></math></span>) is almost an approximate wave function. A dimensionless parameter <span><math><mrow><mi>Δ</mi><mi>ζ</mi></mrow></math></span> is proposed to measure the frequency and amplitude of boundary oscillations. The trend of <span><math><mrow><mi>Δ</mi><mi>ζ</mi><mrow><mo>(</mo><mi>t</mi><mo>)</mo></mrow></mrow></math></span> over time satisfies the wave equation, which shows that the plate undergoes a similar harmonic vibration after the force is applied. The function can be viewed as a superposition of an external force (from the flow field) induced oscillation (<span><math><msub><mrow><mi>ζ</mi></mrow><mrow><mn>1</mn></mrow></msub></math></span>) and a self-inertial oscillation (<span><math><msub><mrow><mi>ζ</mi></mrow><mrow><mn>2</mn></mrow></msub></math></span>). We found that increasing the initial distance <span><math><mi>γ</mi></math></span> mainly reduces the maximum amplitude of the external force-induced oscillation <span><math><msub><mrow><mi>ζ</mi></mrow><mrow><mn>1</mn></mrow></msub></math></span>. Increasing the plate thickness <em>h</em> results in a reduction of both the frequency and amplitude of the oscillation function. Some of the conclusions of this work can be applied to the design of new hydromechanics of materials.</div></div>","PeriodicalId":339,"journal":{"name":"International Journal of Multiphase Flow","volume":"188 ","pages":"Article 105203"},"PeriodicalIF":3.6,"publicationDate":"2025-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143682040","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Three-dimensional display of foam-driven oil displacement in porous materials","authors":"Najeeb Anjum Soomro","doi":"10.1016/j.ijmultiphaseflow.2025.105221","DOIUrl":"10.1016/j.ijmultiphaseflow.2025.105221","url":null,"abstract":"&lt;div&gt;&lt;div&gt;This research provides new insights into foam-enhanced oil recovery (EOR) by using advanced X-ray CT imaging to reveal foam displacement mechanisms in porous media. It highlights the superior stability and efficiency of nitrogen foam over CO₂ foam, offering practical guidelines to optimize EOR operations in heterogeneous and gravity-affected reservoirs. Due to its superior mobility control and sweep efficiency compared to other injection methods like gas flooding, water flooding, and other EOR techniques, foam-enhanced oil recovery, or EOR, has been used as an improved recovery method. High-viscosity foam shows significant potential for liquid displacement. Foam's relative immobility in porous media appears to more stable displacement prevent fingers from forming during oil displacement, which results in a more stable displacement. Nevertheless, several factors, including the characteristics of the oil, the permeability of the rock in the reservoir, the chemical and physical makeup of the foam, and others, could potentially affect how effective foam assisted oil displacement is. Furthermore, it is yet unclear how the foam interacts with and moves within the porous environment. Therefore, using a porous media setup with gases, water, surfactant, and foam injection, we examined oil recovery three-dimensional (3D) properties in this work. The patterns of fluid displacement were recorded and examined using a CT scanning scanner. Additionally, the impact of oil viscosity on patterns of foam displacement is investigated. The study offers a quantitative and qualitative experimental visualization of liquid and foam injection, oil recovery with gases, and 3D displacement structures. Consequently, foam injection exhibits good sweeping ability and produces a stable displacement front, as demonstrated by comparing fluid displacement patterns between gases, water, surfactant, and foam. Oil displacement was enhanced by the synergistic action of the surfactant, liquid, and gas components that combine to form foam. On the other hand, investigations with gas flooding and liquid flooding demonstrate trapped oil, gravity segregation, and viscous fingering. The foam that produced the best oil recovery factor displaced steadily across the permeable bed. This work clarified the mechanism of foam movement in porous media. When foam comes into contact with oil and porous medium, it bursts into free-moving liquid and gas particles. As a result, the foam injection experiment revealed two displacement fronts: the continuously flowing gas/liquid layer in front, which moves forward in contact with the oil bank, and the steadily flowing foam bank in the rear. Oil viscosity has no discernible effect on foam displacement because of the foam bank's stable displacement, which also means that there is no difference in the displacement patterns. Although the displaced oil has varying viscosities, the flow regimes remain consistent. A linear link has not been demonstrated ","PeriodicalId":339,"journal":{"name":"International Journal of Multiphase Flow","volume":"188 ","pages":"Article 105221"},"PeriodicalIF":3.6,"publicationDate":"2025-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143704788","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Spectral analysis of preferential concentration in turbulent flows: parametric dependence on Reynolds, stokes, and froude numbers","authors":"George H. Downing,&nbsp;Yannis Hardalupas","doi":"10.1016/j.ijmultiphaseflow.2025.105222","DOIUrl":"10.1016/j.ijmultiphaseflow.2025.105222","url":null,"abstract":"<div><div>Understanding the preferential concentration of inertial particles in turbulent flows is crucial for a wide range of natural and industrial processes. This study advances our understanding of turbulence-particle interactions by systematically evaluating the combined effects of turbulent Reynolds number (Re_λ), Stokes number (Stk), and Froude number (Fr) on particle clustering through direct numerical simulations (DNS). Our analysis demonstrates that particle clustering intensity peaks at Stk ∼ 1, where particles optimally interact with turbulent eddies. While previous research often overlooks the influence of Reynolds number, our findings reveal that this assumption holds for small Stk, but for larger Stk, Reynolds number significantly impacts clustering behaviour. Gravitational effects, quantified by Fr, also play a critical role in clustering dynamics. For Stk &lt;&lt; 1, gravity's impact is minimal for Fr &lt; 5.0; however, as Stk increases, gravity enhances large-scale clustering and modulates small-scale clustering—diminishing it for intermediate Stk ∼ 1 and enhancing it for Stk &gt;&gt; 1. Here, large-scale clustering refers to particle clustering at scales comparable to the largest energy-containing eddies, while small-scale clustering involves particle clustering at the dissipative scales of turbulence. We introduce a novel empirical model that predicts particle concentration spectra within 12 % relative error across a wide range of conditions <span><math><mrow><mo>(</mo><mrow><mn>0.1</mn><mo>≤</mo><mspace></mspace><mi>S</mi><mi>t</mi><mi>k</mi><mo>≤</mo><mspace></mspace><mn>5.0</mn><mo>;</mo><mspace></mspace><mn>57</mn><mo>≤</mo><mspace></mspace><mi>R</mi><mi>e</mi><mo>≤</mo><mspace></mspace><mn>111</mn><mo>;</mo><mspace></mspace><mn>0.0</mn><mo>≤</mo><mspace></mspace><mi>F</mi><mi>r</mi><mo>≤</mo><mspace></mspace><mn>5.0</mn></mrow><mo>)</mo><mo>,</mo><mspace></mspace></mrow></math></span>validated against current and previous studies. This model provides a practical tool for analysing particle-laden turbulent flows in large spaces and has substantial implications for atmospheric science, chemical engineering, and environmental studies, offering improved predictions of droplet clustering in clouds, particulate dispersion in reactors, and pollutant transport.</div></div>","PeriodicalId":339,"journal":{"name":"International Journal of Multiphase Flow","volume":"188 ","pages":"Article 105222"},"PeriodicalIF":3.6,"publicationDate":"2025-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143682038","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A new approach to unravel the lift force phenomenon of a single bubble rising in stagnant and sheared liquids","authors":"Mohammad Karimi Zand ,&nbsp;Stefan Puttinger ,&nbsp;Mahdi Saeedipour","doi":"10.1016/j.ijmultiphaseflow.2025.105219","DOIUrl":"10.1016/j.ijmultiphaseflow.2025.105219","url":null,"abstract":"<div><div>The lateral distribution of bubbles rising in plumes is determined by the lift force induced on the bubbles. The lift force is exerted due to the presence of vorticity in the immediate vicinity of the bubble. Here, we have proposed a new approach to describe how the interface deformation governed by the surface tension force contributes to the vorticity generation near the bubble, subsequently leading to the lift force’s emergence. Using the vorticity transport equation, we compute the vorticity generation rate due to the bubble deformation, and compare it to the bubble lateral acceleration, which is a representation of the lateral forces acting on the bubble. Using the interface-resolved volume of fluid (VOF) method, we have simulated single bubbles rising in both stagnant liquid, and under the influence of a background shear flow. Bubbles with different sizes were simulated inside various liquid media, corresponding to a wide range of Eotvos numbers (<span><math><mrow><mn>0</mn><mo>.</mo><mn>55</mn><mo>&lt;</mo><mtext>Eo</mtext><mo>&lt;</mo><mn>5</mn><mo>.</mo><mn>96</mn></mrow></math></span>) and Morton numbers (−10.5 <span><math><mrow><mo>&lt;</mo><mi>L</mi><mi>o</mi><mi>g</mi><mspace></mspace><mtext>Mo</mtext><mo>&lt;</mo></mrow></math></span> −3.8). Results disclose a consistent match between vorticity generation rate due to the bubble deformation and the lateral force induced on the bubble on both freely-rising condition and rising with presence of a background shear. This theory implies a physical interconnection between these phenomena which not only describes the zigzag movements of bubbles when rising freely, but also explains the direction change of bubble lateral migration in shear flows. The findings hold a direct implication in defining a universal lift force model for describing bubble lateral movements.</div></div>","PeriodicalId":339,"journal":{"name":"International Journal of Multiphase Flow","volume":"188 ","pages":"Article 105219"},"PeriodicalIF":3.6,"publicationDate":"2025-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143681982","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Linking lacunarity to inertial particle clustering: Applications in solar photovoltaics","authors":"Sarah E. Smith ,&nbsp;Ryan Scott ,&nbsp;Alberto Aliseda ,&nbsp;Marc Calaf ,&nbsp;Henda Djeridi ,&nbsp;Raúl Bayoán Cal ,&nbsp;Martín Obligado","doi":"10.1016/j.ijmultiphaseflow.2025.105218","DOIUrl":"10.1016/j.ijmultiphaseflow.2025.105218","url":null,"abstract":"<div><div>The presence of wind-flung debris is inevitable in solar photovoltaic (PV) systems, negatively altering production and lifespan by way of adhesion (<em>i.e.</em> soiling) and forceful particle impacts. The propensity and magnitude of particle-to-panel interactions is largely dependent on environmental and panel-invoked turbulence, ultimately dictating local debris concentration and trajectories. This study confronts the mechanisms leading to PV panel soiling by developing a lacunarity-based framework for particle heterogeneity quantifying preferential concentration within asymmetric panel wakes due to inertial coupling. Drawing from established studies in multi-phase homogeneous isotropic turbulence (HIT), presented analysis demonstrates lacunarity as a comparable measure to Voronoï distributions for understanding particle clustering. Considering benchmark data obtained in experimental particle-laden HIT flow, global particle heterogeneity is shown to correlate with <span><math><mrow><mi>R</mi><msub><mrow><mi>e</mi></mrow><mrow><mi>λ</mi></mrow></msub></mrow></math></span> and <span><math><msub><mrow><mi>ϕ</mi></mrow><mrow><mi>v</mi></mrow></msub></math></span> dependencies observed through Voronoï tessellations. Further expanding to consider PV panel wakes, Voronoï analysis and lacunarity uncover location-dependent variations in local particle clustering relating to asymmetric turbulent wake features. In total, this work represents a novel perspective of characterizing particle-laden turbulent flow by way of lacunarity-based heterogeneity and motivates preferential concentration as a complex feature impacting particle trajectories in PV systems.</div></div>","PeriodicalId":339,"journal":{"name":"International Journal of Multiphase Flow","volume":"188 ","pages":"Article 105218"},"PeriodicalIF":3.6,"publicationDate":"2025-03-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143682039","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of gas density on hydrodynamic characteristics and gas-liquid interfacial area in a 5 kW bubble column reactor","authors":"Daewook Kim ,&nbsp;Jae Jun Jang ,&nbsp;Byung Wook Hwang ,&nbsp;Hyungseok Nam ,&nbsp;Doyeon Lee","doi":"10.1016/j.ijmultiphaseflow.2025.105220","DOIUrl":"10.1016/j.ijmultiphaseflow.2025.105220","url":null,"abstract":"<div><div>This study investigated the impact of gas density on the hydrodynamic characteristics and gas-liquid interfacial area within a bubble column reactor, utilizing air, helium, and tap water. The performance of two types of distributors was compared. Key parameters such as gas holdup, transition gas holdup, transition velocity, bubble size, and specific interfacial area were analyzed across various gas velocities, pressures, and helium concentrations in the air-helium mixtures. As the gas density increased, the gas holdup, transition gas holdup, and transition velocity increased. The porous-plate distributor exhibited better performance metrics than the tube-type distributor. Furthermore, power-law relationships were derived for various parameters in both homogeneous and heterogeneous regimes. In the homogeneous regime, gas velocity exerted a more substantial influence on the gas holdup and specific interfacial area than gas density, whereas in the heterogeneous regime, both factors had nearly equivalent influences.</div></div>","PeriodicalId":339,"journal":{"name":"International Journal of Multiphase Flow","volume":"188 ","pages":"Article 105220"},"PeriodicalIF":3.6,"publicationDate":"2025-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143642310","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Behavior of two-phase flow in a single pore with varying temperature and pressure","authors":"K. Alex Chang","doi":"10.1016/j.ijmultiphaseflow.2025.105202","DOIUrl":"10.1016/j.ijmultiphaseflow.2025.105202","url":null,"abstract":"<div><div>For a saturated compositional fluid flowing through a porous medium, a gas phase can appear and disappear. This phenomenon is affected by flow rate, pressure, and temperature. By analyzing a 2 × 2 dynamical system, a previous study investigated the relationship between the aforementioned phenomenon and the injected flow rate at fixed temperature and pressure. The present research extends that study by exploring this phenomenon at various temperatures, initial bubble sizes and outlet pressures. Our results indicate that the direction fields of the 2 × 2 dynamical system depend on the outlet pressure and temperature. At certain critical temperatures, the direction field develops singularity points. These critical temperatures depend on the outlet pressure and the injected concentration of CO<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span>; the critical temperatures increase as the outlet pressure increases and the critical temperatures decrease as the injected concentration of CO<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span> increases. For a fixed outlet pressure and injection flow rate, whether the gas phase behavior is steady-state or cyclic (unstable spiral state) depends on the ratio between inlet and outlet channel radii, as well as temperature. Our computations demonstrate that, at a fixed temperature, the gas phase transitions from a steady state to an unstable spiral state as the ratio of the inlet and outlet channel radii decreases. The steady state features of bubble size, gas phase pressure and liquid pressure depend on the temperature; the bubble size increases while the gas and liquid pressure decrease as the temperature increases.</div></div>","PeriodicalId":339,"journal":{"name":"International Journal of Multiphase Flow","volume":"188 ","pages":"Article 105202"},"PeriodicalIF":3.6,"publicationDate":"2025-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143628551","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Experimental and numerical study of microcavity filling regimes for Lab-on-a-Chip applications","authors":"Luise Nagel ,&nbsp;Anja Lippert ,&nbsp;Ronny Leonhardt ,&nbsp;Tobias Tolle ,&nbsp;Huijie Zhang ,&nbsp;Tomislav Marić","doi":"10.1016/j.ijmultiphaseflow.2025.105208","DOIUrl":"10.1016/j.ijmultiphaseflow.2025.105208","url":null,"abstract":"<div><div>The efficient and voidless filling of microcavities is of great importance for Lab-on-a-Chip applications. However, predicting whether microcavities will be filled or not under different circumstances is still difficult due to the local flow effects dominated by surface tension. In this work, a close-up study of the microcavity filling process is presented, shedding light on the mechanisms of the filling process using experimental insights accompanied by 3D numerical simulations. The movement of a fluid interface over a microcavity array is investigated optically under consideration of different fluids, capillary numbers, and cavity depths, revealing a regime map of different filling states. Moreover, the transient interface progression over the cavities is analyzed with attention to small-scale effects such as pinning. Besides the visual analysis of the image series, quantitative data of the dynamic contact angle and the interface progression is derived using an automated evaluation workflow. In addition to the experiments, 3D Volume-of-Fluid simulations are employed to further investigate the interface shape. It is shown that the simulations can not only predict the filling states in most cases, but also the transient movement and shape of the interface. The data and code associated with this work are publicly available at Bosch Research GitHub (Bosch, 2024) and at the TUdatalib data repository (Nagel et al., 2024).</div></div>","PeriodicalId":339,"journal":{"name":"International Journal of Multiphase Flow","volume":"188 ","pages":"Article 105208"},"PeriodicalIF":3.6,"publicationDate":"2025-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143681984","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}