Physics of Fluids最新文献_第5页

Separation of dispersed microparticle from whole blood using three-dimensional helical tubular microfluidics 利用三维螺旋管微流体从全血中分离分散微粒

2区工程技术

Physics of Fluids Pub Date : 2025-05-01 DOI: 10.1063/5.0266385

Shenghong Zhang, Yunshu Lu, Satoshi Ii, Kazuyasu Sugiyama, Shigeho NODA, Xiajing Che, Xiaobo Gong

{"title":"Separation of dispersed microparticle from whole blood using three-dimensional helical tubular microfluidics","authors":"Shenghong Zhang, Yunshu Lu, Satoshi Ii, Kazuyasu Sugiyama, Shigeho NODA, Xiajing Che, Xiaobo Gong","doi":"10.1063/5.0266385","DOIUrl":"https://doi.org/10.1063/5.0266385","url":null,"abstract":"Purification of blood from microparticles while maintaining its suitability for autotransfusion provides a revolutionary support for advanced healthcare through circulatory system of blood flows. However, there is a great challenge in the separation of particles from blood physically with high efficiency. Here, we proved a novel approach for whole blood treatment of microparticle separation utilizing a three-dimensional microfluidic chip with helical structures of tubular channels. The chips with helical structures characterized by spiral diameters and pitches are fabricated with flexible silicon-based tubes with different inner diameters in which photolithography is not required. By controlling Reynolds and Dean numbers to generate appropriate stable Dean flow along the tubular channels, microparticles with diameters from 15 to 30 μm are separated directly from untreated whole blood with about 10% blood loss, and the free-hemoglobin concentration after separation remains in a safe level for further clinical transfusion. Two distinct patterns of particle accumulation in the cross section of microtubes are observed. It is also interesting to find that different from many practices that lyse red blood cells before particle or cell sorting, the intensive cell-particle interactions in whole blood facilitate particle focusing to regions closer to channel walls than in pure liquid without red blood cells. This label-free particle separation method, based on hydrodynamical interactions among the particles and deformable blood cells in stable Dean vortexes of helical tubular microfluidic chips, not only paves the way for innovative healthcare using functional microparticles but also enlightens the sorting of nucleated cells separation from whole blood biophysically.","PeriodicalId":20066,"journal":{"name":"Physics of Fluids","volume":"37 5","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147891364","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}

引用次数: 1

Preparation and characterization of in situ cured vegetable-based resin plugging agent for fracture plugging in reservoirs 油层裂缝封堵用原位固化植物基树脂封堵剂的制备与表征

2区工程技术

Physics of Fluids Pub Date : 2025-04-01 DOI: 10.1063/5.0260448

Yadong Chen, Yu Peng, Yongming Li, Dingyuan Zhang, Jiandu Ye, Zhenglan Li, Pengjun Shi

{"title":"Preparation and characterization of <i>in situ</i> cured vegetable-based resin plugging agent for fracture plugging in reservoirs","authors":"Yadong Chen, Yu Peng, Yongming Li, Dingyuan Zhang, Jiandu Ye, Zhenglan Li, Pengjun Shi","doi":"10.1063/5.0260448","DOIUrl":"https://doi.org/10.1063/5.0260448","url":null,"abstract":"Epoxy resin has been mainly used as a monomer to construct an in situ curing plugging agent in casing leakage treatment, but epoxy resin is expensive. In this study, epoxidized vegetable oil (EVO) was prepared by the modification of a soybean oil sediment (VO). A new type of high-value-added in situ curing plant-based resin plugging agent (BEVO) was successfully prepared by modifying EVO and methylhexahydrophthalic anhydride (MHHPA) with bisphenol A benzoxazine (BZ). The blending properties, curing time, curing strength, thermal stability, thermomechanical properties, rheology, and plugging performance were statistically evaluated. The experimental results showed that MHHPA and BZ with EVO build double-crosslinked structures of polyester and polyether, respectively, in the EVO/MHHPA/BZ reaction system. Curing times in the range of 120–720 min can be controlled by adjusting the amount of accelerator from 0–4 wt. %. Both elevated temperatures and increased shear rates were effective in reducing the viscosity of the BEVO reaction solution, and the monomer structure of the BEVO reaction solution was not broken over the range of shear rates from 0.1 to 100 s−1. BEVO reaction solutions with 10–20 wt. % BZ content have excellent pumpability, and a viscosity time below 100 mPa·s for more than 60 min on the viscosity–temperature curve. Meanwhile, it exhibited excellent injection and plugging performances. When the pumping rate is 8 ml/min, the pumping pressure is 0.16 and 0.4 MPa, and the breakthrough plugging pressure is more than 32.5 MPa and the stable plugging pressure is more than 18.9 MPa for the 0.5 mm steel fracture cores.","PeriodicalId":20066,"journal":{"name":"Physics of Fluids","volume":"37 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147892100","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}

引用次数: 1

A novel polymer gel system with low density property for preferential flow control to enhanced oil recovery 一种新型低密度聚合物凝胶体系，优先控制流动，提高采收率

2区工程技术

Physics of Fluids Pub Date : 2025-04-01 DOI: 10.1063/5.0268039

Chuanhong Kang, Jixiang Guo, Dongtao Fei, Pengcheng Xue, Lifang Jiao

{"title":"A novel polymer gel system with low density property for preferential flow control to enhanced oil recovery","authors":"Chuanhong Kang, Jixiang Guo, Dongtao Fei, Pengcheng Xue, Lifang Jiao","doi":"10.1063/5.0268039","DOIUrl":"https://doi.org/10.1063/5.0268039","url":null,"abstract":"Polymer gels have been widely used in reservoir flow control, profile control, and enhanced oil recovery. However, the density of gel used is usually higher than formation water, so the gel will precipitate in formation water, resulting in poor or even ineffective water plugging. Inspired by aerogel materials known for their porous structure and extremely low density, by PSC, we mean a terpolymer mixing system consisting of polyurethane, vaporous hydrophobic silica nanoparticles, and cellulose nanofibers. A density regulator (PSC-Sponge) was prepared by one-step freeze-drying of PSC. PSC-Sponge significantly reduces the system density before and after gelation, with the maximum densities of the gel system before and after gelation lowered to 0.82 and 0.85 g/cm3, respectively. A novel method based on optical micro-rheology was innovatively proposed to study the gelation time and viscoelastic changes in the gel system without external force after the addition of PSC-Sponge. Experimental results demonstrate that PSC-Sponge markedly enhances the mechanical strength, temperature resistance, and viscoelastic performance of the gel, improving the gel network structure to form a dense three-dimensional network. Field test results show that the low-density gel can effectively reduce the water content of the well, the water content of the well is reduced from 100% to 21%, and the cumulative oil increase is 3707 t. Low density gel is a kind of profile control agent that is resistant to dilution, and it provides experimental basis and field guidance for profile control and water plugging to enhance oil recovery in high water cut reservoir.","PeriodicalId":20066,"journal":{"name":"Physics of Fluids","volume":"37 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147903953","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}

引用次数: 2

Daughter bubbles generation via bubble bursting induced by ultrasonic radiation 超声辐射诱导破泡产生子泡

2区工程技术

Physics of Fluids Pub Date : 2025-04-01 DOI: 10.1063/5.0257259

Xiuxing Tang, Liang Zhang, Minghao Zhou, Xiaoke NONG, Changlin Ding, Yuheng Shi, Muyang Zhang, Kai Mu, Duyang Zang

引用次数: 3

Droplet detachment and transport on a biomimetic surface inspired by lotus leaves under the influence of an electric field 受荷叶启发的仿生表面上液滴在电场作用下的分离和传输

2区工程技术

Physics of Fluids Pub Date : 2025-03-01 DOI: 10.1063/5.0257235

Kai Guo, Yin Bai, Yunrui Han, Zheqiu Yan, Yuling Lü, Xiaoming Luo

引用次数: 3

Experimental investigation on the drag reduction mechanism of non-Newtonian flow in microchannels with wall cavities 带壁腔微通道非牛顿流减阻机理的实验研究

2区工程技术

Physics of Fluids Pub Date : 2025-03-01 DOI: 10.1063/5.0258077

Yi Huang, Hao Ye, Shuai Yin, Ran Gao, Zhi Tao, Ting Li, Haiwang Li

{"title":"Experimental investigation on the drag reduction mechanism of non-Newtonian flow in microchannels with wall cavities","authors":"Yi Huang, Hao Ye, Shuai Yin, Ran Gao, Zhi Tao, Ting Li, Haiwang Li","doi":"10.1063/5.0258077","DOIUrl":"https://doi.org/10.1063/5.0258077","url":null,"abstract":"The research in the drag reduction mechanism of microscale flows plays a crucial role in fields such as biomedicine, energy systems, and microscale mechatronics. While most existing research primarily focuses on numerical simulations or measurements of simple Newtonian fluids flow in microchannels, little attention has been paid on non-Newtonian flow and its coupling effect with different wall cavities. In this work, we conducted a systematical investigation on the flow characteristics of non-Newtonian flow at microscale targeting on the coupling effect of the non-Newtonian shear thinning effect and cavitation structures for flow resistance reduction, where both the flow characteristics and the detailed flow fields were measured by means of self-built high speed micro-particle image velocimetry. The results prove that the coupling effect between microscale wall cavities and the shear-thinning effect of non-Newtonian flow can significantly reduce shear stress, achieving a maximum drag reduction rate of 77.06%. Among the six cavity structures tested, right-angled triangular cavities and semi-circular cavities exhibit superior drag reduction performance. The stagnant flow formed within right-angled triangular cavities can reduce the contact area between the main flow and the walls, thereby minimizing viscous losses. The highest streamlining degree of semi-circular cavities lowers localized vorticity and shear stress to reduce flow resistance. This work explores the drag reduction mechanism of non-Newtonian fluid coupled with wall cavities in microchannels from the perspective of experimental measurements, which can guide the design of microchannels focused on enhancing drag reduction and energy conservation.","PeriodicalId":20066,"journal":{"name":"Physics of Fluids","volume":"37 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147887566","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}

引用次数: 3

Dynamic characteristics and energy variation of droplet impacting on a quartz surface 液滴撞击石英表面的动态特性及能量变化

2区工程技术

Physics of Fluids Pub Date : 2025-02-01 DOI: 10.1063/5.0251456

Bingyou Jiang, Gaochao Pan, Chunshan Zheng, Xiaohan Wang, Yi Zhang, Jianqiang Yin, Hongzheng Zhu

{"title":"Dynamic characteristics and energy variation of droplet impacting on a quartz surface","authors":"Bingyou Jiang, Gaochao Pan, Chunshan Zheng, Xiaohan Wang, Yi Zhang, Jianqiang Yin, Hongzheng Zhu","doi":"10.1063/5.0251456","DOIUrl":"https://doi.org/10.1063/5.0251456","url":null,"abstract":"Understanding the impact process of droplets on surfaces is a crucial prerequisite for enhancing the efficiency of wetting dust removal. The collision dynamics between water droplets and quartz surfaces were investigated using a high-speed camera, revealing four distinct stages in this process. During the first three stages, there was an increase in droplet width and three-phase contact line over time, while the droplet height and contact angle decreased. These observations can be attributed to the combined effects of impulsive force and surface tension. With increasing droplet velocity, the duration of the first three stages prolonged, accompanied by an increase in both the diameter of the three-phase contact line and droplet width during the final stage, whereas there was a decrease in droplet height and contact angle. This behavior primarily arises from energy transfer involving kinetic energy converted into contact surface energy, droplet surface energy, and dissipated energy during collision events. Contact surface energy and droplet surface energy exhibited an upward trend with rising droplet velocity. Simultaneously, collision-induced dissipated energy increased proportionally with respect to droplet velocity. Notably, both the rate and ratio of dissipated energy demonstrated positive correlations with the Weber number; specifically following a linear relationship characterized by a slope value of 2.81. These findings offer valuable insights for advancing technology development related to equipment used for wetting dust removal.","PeriodicalId":20066,"journal":{"name":"Physics of Fluids","volume":"37 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147894388","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}

引用次数: 4

Preparation and characterization of inorganic foam modified with nano-magnesium hydroxide for inhibiting coal spontaneous combustion 纳米氢氧化镁改性煤自燃无机泡沫的制备与表征

2区工程技术

Physics of Fluids Pub Date : 2025-02-01 DOI: 10.1063/5.0254870

Jingxia Tang, Jiawen Cai, Shengqiang Yang, Zhaoyang Yu, Kexin Chen, Xincheng Hu

{"title":"Preparation and characterization of inorganic foam modified with nano-magnesium hydroxide for inhibiting coal spontaneous combustion","authors":"Jingxia Tang, Jiawen Cai, Shengqiang Yang, Zhaoyang Yu, Kexin Chen, Xincheng Hu","doi":"10.1063/5.0254870","DOIUrl":"https://doi.org/10.1063/5.0254870","url":null,"abstract":"To overcome the poor stability of currently employed foam material in preventing coal spontaneous combustion, the nano-stabilized foam was proposed in this study. Considering foamability and stability, the optimized concentration ranges and the interaction effect of each component were determined through single-factor experiments and response surface analysis. In the appropriate concentration range, the addition of nano-magnesium hydroxide further enhanced the foam stability. The optimal composition of nano-stabilized foam was obtained using the parametric optimization function. The stability coefficient of nano-stabilized foam was up to 99.91%. It can maintain the foam form for the longest time (&gt;48 h), providing long-term wetting and oxygen insulation. Compared with other comparative foam materials, the nano-stabilized foam treated coal sample exhibited the minimal oxygen consumption rate and index gas release amount. Nano-stabilized foam can play the largest role in inhibition, and the inhibition rate was 70.61% at 100 °C. The inhibition rate of coal samples treated with nano-stabilized foam was also observed to be the biggest at each temperature. The coal sample treated with nano-stabilized foam had the highest cross-point temperature (242.3 °C), which was 31.47% than the raw coal. These experimental findings exhibit that the nano-stabilized foam has superior foam stability and inhibitory effect.","PeriodicalId":20066,"journal":{"name":"Physics of Fluids","volume":"37 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147878498","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}

引用次数: 5

TurbineNet: Advancing tidal turbine blade hydrodynamic performance prediction with neural networks TurbineNet：基于神经网络的潮汐涡轮机叶片水动力性能预测

2区工程技术

Physics of Fluids Pub Date : 2025-02-01 DOI: 10.1063/5.0252011

Jian Xu, Longyan Wang, Jianping Yuan, Zilu Wang, Bowen Zhang, Zhaohui Luo, Andy Tan

{"title":"TurbineNet: Advancing tidal turbine blade hydrodynamic performance prediction with neural networks","authors":"Jian Xu, Longyan Wang, Jianping Yuan, Zilu Wang, Bowen Zhang, Zhaohui Luo, Andy Tan","doi":"10.1063/5.0252011","DOIUrl":"https://doi.org/10.1063/5.0252011","url":null,"abstract":"The efficient prediction of system performance is a critical aspect of engineering equipment design, with the traditional methods facing limitations such as high computational demands and precise experimental setups. In response to these limitations, neural network prediction models offer a promising solution due to their lightweight and efficient predictive capabilities. In this context, the evolution of deep learning and computer vision has significantly influenced engineering design applications, particularly in recognizing intricate three-dimensional (3D) structural features. This study addresses the challenges of rapidly and efficiently predicting the performance of horizontal axis tidal turbine (HATT) blades by leveraging artificial intelligence technology. The proposed solution, named TurbineNet, is a neural network specifically designed for predicting the hydrodynamic performance of complex 3D turbine blades. TurbineNet utilizes two descriptors to capture the mesh information and structural features, refining these features through mesh convolution layers. The model establishes a robust connection between the blade features and hydrodynamic performance parameters via two fully connected layers. Through extensive training and validation, TurbineNet demonstrates proficiency in processing and identifying intricate blade surface features, resulting in accurate predictions of HATT hydrodynamic performance. The study showcases the robustness of TurbineNet through extensive testing, revealing its ability to predict hydrodynamic parameters with a relative error of 2%. This exceptional performance positions TurbineNet as a valuable tool for predicting the hydrodynamic performance of complex 3D turbine blade structures, offering a reliable means for assessing engineering equipment performance.","PeriodicalId":20066,"journal":{"name":"Physics of Fluids","volume":"37 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147888056","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}

引用次数: 4

Transportation behaviors of double emulsion droplets under the influence of varied interfacial tensions 界面张力影响下双乳液滴的输运行为

2区工程技术

Physics of Fluids Pub Date : 2025-02-01 DOI: 10.1063/5.0253760

Xiang Wang, Chao Sun, Peng Su, Yan Pang, Zhaomiao Liu

{"title":"Transportation behaviors of double emulsion droplets under the influence of varied interfacial tensions","authors":"Xiang Wang, Chao Sun, Peng Su, Yan Pang, Zhaomiao Liu","doi":"10.1063/5.0253760","DOIUrl":"https://doi.org/10.1063/5.0253760","url":null,"abstract":"The transportation behaviors and dynamic characteristics of double emulsion droplets in a Y-junction are experimentally investigated to explore the influence of the interfacial tension. Based on the breakup behaviors, three flow patterns are identified: non-breakup (NB), once breakup of the outer droplet (OB), and twice breakup of the outer droplet (TB). Compared to the single emulsions, the inner droplet leads to new flow patterns for the double emulsions due to the coupling effect between interfaces. The flow pattern map can be built using the normalized droplet length and the capillary number. With the aid of the quantitative expression of the transition thresholds using a power law relation, the transitions are further found to rely on the junction structure and the physical properties of the double emulsion. It is indicated that the dynamic characteristics of double emulsions are shaped jointly by multiple controlling parameters, such as the droplet length, the capillary number, and the junction structure. A force model is proposed to estimate the quantitative evolutions of the working forces in different flow patterns. The evolution of the droplet morphology is consistent with the forces acting on it, and the prerequisite condition for the droplet breakup is confirmed to depend on the competition between the sum of the driving forces and the sum of the interfacial tensions. The variation of the transition thresholds in different liquid systems is further analyzed, which may provide useful methods to manipulate the double emulsions by changing the physical properties.","PeriodicalId":20066,"journal":{"name":"Physics of Fluids","volume":"37 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147905247","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}

引用次数: 4