Physical Review Fluids最新文献_第3页

Laser-induced cavitation in liquid He4 near the liquid-vapor critical point 液态 He4 在液气临界点附近的激光诱导空化

IF 2.7 3区物理与天体物理

Physical Review Fluids Pub Date : 2024-09-09 DOI: 10.1103/physrevfluids.9.l091601

Kenneth R. Langley, Tariq Alghamdi, Andres A. Aguirre-Pablo, Nathan B. Speirs, S. T. Thoroddsen, Peter Taborek

{"title":"Laser-induced cavitation in liquid He4 near the liquid-vapor critical point","authors":"Kenneth R. Langley, Tariq Alghamdi, Andres A. Aguirre-Pablo, Nathan B. Speirs, S. T. Thoroddsen, Peter Taborek","doi":"10.1103/physrevfluids.9.l091601","DOIUrl":"https://doi.org/10.1103/physrevfluids.9.l091601","url":null,"abstract":"High-speed videos in an optical cryostat, with frame rates up to <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mrow><mn>5</mn><mo>×</mo><msup><mn>10</mn><mn>6</mn></msup></mrow></math> fps, are used to study the dynamics of laser-induced cavitation in helium near the critical point and in the supercritical region. The propagation of strong shock waves are observed in both regimes. The time dependence of the cavitation bubble radius as well as the acoustic pressure field outside the bubble are described by standard compressible flow models. In the temperature range <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mrow><mn>4</mn><mi>K</mi><mo><</mo><mi>T</mi><mo><</mo><mn>5.2</mn><mi>K</mi></mrow></math>, a symmetric cloud of micron-scale bubbles are observed outside the main cavitation bubble as it approaches its maximum radius which is due to homogeneous nucleation and spinodal decomposition in the low-pressure fluid outside the bubble. Nucleation of secondary bubbles is also observed far below the critical point, but this requires large negative pressures that can be generated by shock waves that reflect from the primary bubble.","PeriodicalId":20160,"journal":{"name":"Physical Review Fluids","volume":"28 1","pages":""},"PeriodicalIF":2.7,"publicationDate":"2024-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142210885","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Anti-plane segregation and diffusion in dense, bidisperse granular shear flow 致密双分散粒状剪切流中的反面离析和扩散

IF 2.7 3区物理与天体物理

Physical Review Fluids Pub Date : 2024-09-05 DOI: 10.1103/physrevfluids.9.094301

Harkirat Singh, David L. Henann

{"title":"Anti-plane segregation and diffusion in dense, bidisperse granular shear flow","authors":"Harkirat Singh, David L. Henann","doi":"10.1103/physrevfluids.9.094301","DOIUrl":"https://doi.org/10.1103/physrevfluids.9.094301","url":null,"abstract":"Many dense granular systems are non-monodisperse, consisting of particles of different sizes, and will segregate based on size during flow. This phenomenon is an important aspect of many industrial and geophysical processes, necessitating predictive continuum models. This paper systematically studies a key aspect of the three-dimensional nature of segregation and diffusion in flowing, dense, bidisperse granular mixtures—namely, segregation and diffusion acting along the direction perpendicular to the plane of shearing, which we refer to as the anti-plane modes of segregation and diffusion. To this end, we consider discrete-element method (DEM) simulations of flows of dense, bidisperse mixtures of frictional spheres in an idealized configuration that isolates anti-plane segregation and diffusion. We find that previously developed constitutive equations, calibrated to DEM simulation results from flows in which both the segregation and diffusion processes occur within the plane of shearing, do not capture aspects of the anti-plane segregation dynamics. Accordingly, we utilize DEM simulation results to inform and calibrate constitutive equations for the segregation and diffusion fluxes in their anti-plane modes. Predictions of the resulting continuum model for the anti-plane segregation dynamics are tested against additional DEM simulation results across different cases, while parameters such as the shear strain rate and mixture composition are varied, and we find that the calibrated model predictions match well with the DEM simulation results. Finally, we suggest a strategy for generalizing the constitutive forms for the segregation and diffusion fluxes to obtain three-dimensional constitutive equations that account for both the in-plane and the anti-plane modes of the segregation and diffusion processes.","PeriodicalId":20160,"journal":{"name":"Physical Review Fluids","volume":"80 1","pages":""},"PeriodicalIF":2.7,"publicationDate":"2024-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142210860","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Instability of stratified air-water flows in circular pipes 圆管中分层气水流的不稳定性

IF 2.7 3区物理与天体物理

Physical Review Fluids Pub Date : 2024-09-05 DOI: 10.1103/physrevfluids.9.093901

Ilya Barmak, Alexander Gelfgat, Neima Brauner

{"title":"Instability of stratified air-water flows in circular pipes","authors":"Ilya Barmak, Alexander Gelfgat, Neima Brauner","doi":"10.1103/physrevfluids.9.093901","DOIUrl":"https://doi.org/10.1103/physrevfluids.9.093901","url":null,"abstract":"This work deals with the stability of two-phase stratified air-water flows in horizontal circular pipes. For this purpose, we performed a linear stability analysis, which considers all possible three-dimensional infinitesimal disturbances and takes into account deformations of the air-water interface. The main results are presented in the form of stability maps, which compare well with the available experimental data. The neutral stability curves are accompanied by the corresponding wavenumbers and wave speeds of the critical perturbations, as well as by spatial patterns of their velocity components. Accordingly, several modes of the critical perturbation are revealed. Long waves are found to be the critical perturbation over part of the stability boundary, and they are affected by the surface tension due to the confinement effect of the lateral direction. Exploring the effect of pipe diameter on the stability boundary and critical perturbations shows that for small water holdups (i.e., thin water film) the scaling of the critical gas velocity by the gas Froude number is valid for pipe diameters larger than about 0.1 m, where the surface tension effects due to the lateral confinement become negligible. Comparing results obtained in pipe, square-duct, and two-plate geometries, we show that there are cases where the simplified geometry of two parallel plates can be employed to model the realistic geometry reasonably well.","PeriodicalId":20160,"journal":{"name":"Physical Review Fluids","volume":"12 1","pages":""},"PeriodicalIF":2.7,"publicationDate":"2024-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142227811","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Evidence of a finite-time pointlike singularity solution for the Euler equations for perfect fluids 完美流体欧拉方程有限时间点状奇点解的证据

IF 2.7 3区物理与天体物理

Physical Review Fluids Pub Date : 2024-09-05 DOI: 10.1103/physrevfluids.9.094401

Diego Martínez-Argüello, Sergio Rica

{"title":"Evidence of a finite-time pointlike singularity solution for the Euler equations for perfect fluids","authors":"Diego Martínez-Argüello, Sergio Rica","doi":"10.1103/physrevfluids.9.094401","DOIUrl":"https://doi.org/10.1103/physrevfluids.9.094401","url":null,"abstract":"This paper investigates the evolution of the Euler equations near a potential blow-up solution. We employ an approach where this solution exhibits second-type self-similarity, characterized by an undetermined exponent <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mi>ν</mi></math>. This exponent can be seen as a nonlinear eigenvalue, determined by the solution of a self-similar partial differential equation with appropriate boundary conditions. Specifically, we demonstrate the existence of an axisymmetric solution of the Euler equations by expanding the axial vorticity using associated Legendre polynomials as a basis. This expansion results in an infinite hierarchy of ordinary differential equations, which, when truncated up to a certain order <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><msup><mi>N</mi><mo>*</mo></msup></math>, allows for the numerical resolution of a finite set of ordinary differential equations. Through this numerical analysis, we obtain a solution that satisfies the appropriate boundary conditions for a specific value of the exponent <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mi>ν</mi></math>. By exploring various truncations, we establish a sequence in <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><msup><mi>N</mi><mo>*</mo></msup></math> for the parameter <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><msub><mi>ν</mi><msup><mi>N</mi><mo>*</mo></msup></msub></math>, providing evidence of the convergence of the exponent <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mi>ν</mi></math>. Our findings suggest a self-similar exponent <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mrow><mi>ν</mi><mo>≈</mo><mn>2</mn></mrow></math>, presenting a promising path for a numerical or analytical approach indicating that <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mi>ν</mi></math> may indeed be exactly 2.","PeriodicalId":20160,"journal":{"name":"Physical Review Fluids","volume":"12 1","pages":""},"PeriodicalIF":2.7,"publicationDate":"2024-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142210966","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Helicity transfer in compressible turbulent flows 可压缩湍流中的螺旋力传递

IF 2.7 3区物理与天体物理

Physical Review Fluids Pub Date : 2024-09-04 DOI: 10.1103/physrevfluids.9.094603

Zheng Yan, Junfeng Wu, Zhu Lei, Jianchun Wang, Lifeng Wang, Xinliang Li, Changping Yu

{"title":"Helicity transfer in compressible turbulent flows","authors":"Zheng Yan, Junfeng Wu, Zhu Lei, Jianchun Wang, Lifeng Wang, Xinliang Li, Changping Yu","doi":"10.1103/physrevfluids.9.094603","DOIUrl":"https://doi.org/10.1103/physrevfluids.9.094603","url":null,"abstract":"The dual-channel characteristics of large-scale helicity transfer in compressible turbulent flows, including subgrid-scale (SGS) and viscosity terms, are investigated. After selecting a suitable definition for large-scale helicity, we confirm the existence of the dual channel of SGS and viscosity terms of large-scale helicity governing equations and theoretically prove that no dual pressure term channel exists. The second channel of the SGS and viscosity terms also consists of two terms, which originate from the rotation of the SGS stress and the baroclinic of the velocity and density gradients, respectively. The identical relationship of the ensemble averages of the dual channel of SGS and viscosity terms can be theoretically and numerically confirmed, whereas their second channel which is associated with shocklets is more intermittent. For the SGS term, the compression regions are dominant in contrast to the expansion regions, and the strain regions are dominant in contrast to the rotation regions in the inertial scale range. The viscous dissipation mechanism of large-scale helicity differs from that of large-scale kinetic energy. It is dominated by the first channel on the inside of the vortex structure and by the second channel on the outside. The further decompositions of the second channel of the SGS and viscosity terms provide a possible mechanism for the inverse helicity transfer. This means that expansion motions promote inverse helicity transfer through the second terms of their second channels.","PeriodicalId":20160,"journal":{"name":"Physical Review Fluids","volume":"1 1","pages":""},"PeriodicalIF":2.7,"publicationDate":"2024-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142227910","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Efficient dynamic mixed subgrid-scale model 高效动态混合亚网格尺度模型

IF 2.7 3区物理与天体物理

Physical Review Fluids Pub Date : 2024-09-03 DOI: 10.1103/physrevfluids.9.l092601

Prahladh S. Iyer, Mujeeb R. Malik

{"title":"Efficient dynamic mixed subgrid-scale model","authors":"Prahladh S. Iyer, Mujeeb R. Malik","doi":"10.1103/physrevfluids.9.l092601","DOIUrl":"https://doi.org/10.1103/physrevfluids.9.l092601","url":null,"abstract":"It is well known that the scale-similarity class of subgrid models have a high correlation with the actual subgrid stresses in a priori tests. However, these models are typically underdissipative and not robust enough to be practically useful for large-eddy simulation. On the other hand, the dynamic Smagorinsky model (DSM), which is a popular subgrid model, is sufficiently dissipative and robust, but has a lower correlation with actual subgrid stresses in a priori tests. There have been many successful attempts to combine the two models into a “mixed” subgrid model that have typically retained the favorable properties of both. However, most dynamic mixed models require two or more levels of test filtering beyond the (often implicit) grid filtered quantities that are solved, in contrast to a single test filtering operation for the dynamic Smagorinsky model. The additional cost involved in test filtering has likely hindered the widespread use of dynamic mixed models in production codes. We propose an efficient dynamic mixed model that is constrained to have the same subgrid dissipation as the DSM model, and only requires a single level of test filtering. Thus, the additional computational cost is negligible compared to the DSM model. A posteriori simulations of the turbulent channel flow reveal that the proposed mixed model is as robust as the DSM model, and more accurate on coarser grids. Notably, smooth-body turbulent separation is better captured by the new model when combined with a standard wall model.","PeriodicalId":20160,"journal":{"name":"Physical Review Fluids","volume":"6 1","pages":""},"PeriodicalIF":2.7,"publicationDate":"2024-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142227909","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Steady-state interfacial gravity waves with one-dimensional class-III triad resonance 具有一维 III 类三元共振的稳态界面重力波

IF 2.7 3区物理与天体物理

Physical Review Fluids Pub Date : 2024-09-03 DOI: 10.1103/physrevfluids.9.094801

Jiyang Li, Zeng Liu, Alistair G. L. Borthwick, Jie Cui, Shijun Liao

{"title":"Steady-state interfacial gravity waves with one-dimensional class-III triad resonance","authors":"Jiyang Li, Zeng Liu, Alistair G. L. Borthwick, Jie Cui, Shijun Liao","doi":"10.1103/physrevfluids.9.094801","DOIUrl":"https://doi.org/10.1103/physrevfluids.9.094801","url":null,"abstract":"Steady-state interfacial waves exhibiting class-III triad resonance are investigated in a two-layer liquid with a free surface. Two independent linear dispersion relationships related to surface and internal modes exist in the idealized model. One-dimensional class-III triad resonance requires the presence of two short surface wave modes and one long internal wave mode in a copropagating wave system. Convergent series solutions are achieved by the homotopy analysis method (HAM) for steady-state interfacial wave groups involving resonant triads and quartets. Unlike conventional progressive interfacial waves that have small surface amplitude and large interface amplitude, the free surface wave height is far larger than that of the internal interface waves because the resonance interactions comprise multiple surface wave modes and a single internal wave mode. As the upper layer thickness increases, energy from the interface is transported to the free surface, and energy in the whole wave system shifts from shorter to longer resonant triads and quartets. Our results indicate that steady-state interfacial waves with class-III exact and near-resonance interactions among surface and internal wave modes could occur in cases representative of the real ocean.","PeriodicalId":20160,"journal":{"name":"Physical Review Fluids","volume":"406 1","pages":""},"PeriodicalIF":2.7,"publicationDate":"2024-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142210842","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Rebound dynamics of inverse Leidenfrost droplets on dry ice surfaces 干冰表面反莱顿弗罗斯特液滴的反弹动力学

IF 2.7 3区物理与天体物理

Physical Review Fluids Pub Date : 2024-09-03 DOI: 10.1103/physrevfluids.9.093601

Yao-Jun Li, Yi-Zhou Liu, Yi-Bo Wang, Min Chen

{"title":"Rebound dynamics of inverse Leidenfrost droplets on dry ice surfaces","authors":"Yao-Jun Li, Yi-Zhou Liu, Yi-Bo Wang, Min Chen","doi":"10.1103/physrevfluids.9.093601","DOIUrl":"https://doi.org/10.1103/physrevfluids.9.093601","url":null,"abstract":"In this paper, we experimentally investigate the rebound dynamics of droplets on dry ice surfaces, unveiling the mechanism behind the inverse Leidenfrost phenomenon. We demonstrated that the underlying mechanism driving the inverse Leidenfrost phenomenon is the lift force from the air film generated by the sublimation of dry ice. The air film prevents droplet condensation, facilitating the droplet rebound. However, the presence of film significantly depends on impact conditions. During the early spreading stage, bubbles nucleate at the contact line due to the sublimation, then the bubbles grow and gradually form an air film. We showed that the droplet rebound occurs only when the air film fully forms before the maximum spreading stage. Otherwise, the contact line is frozen, ultimately preventing rebound. We propose a theoretical expression of critical air film thickness that determines whether the droplet rebounds. Based on the expression, we ultimately established a theoretical criterion for droplet rebound via thermodynamic and fluid dynamics principles. To validate our developed theoretical criterion, we further investigated the inverse Leidenfrost phenomenon for different fluids, Weber numbers, and different temperatures of droplets. The results demonstrate a high consistency between the predicted results of our theoretical criterion and experimental results.","PeriodicalId":20160,"journal":{"name":"Physical Review Fluids","volume":"7 1","pages":""},"PeriodicalIF":2.7,"publicationDate":"2024-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142210846","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Scaling laws of velocity gradient moments of attached eddies 附着涡速度梯度矩的缩放规律

IF 2.7 3区物理与天体物理

Physical Review Fluids Pub Date : 2024-09-03 DOI: 10.1103/physrevfluids.9.094602

X. X. Li, R. F. Hu, L. Fang

{"title":"Scaling laws of velocity gradient moments of attached eddies","authors":"X. X. Li, R. F. Hu, L. Fang","doi":"10.1103/physrevfluids.9.094602","DOIUrl":"https://doi.org/10.1103/physrevfluids.9.094602","url":null,"abstract":"Townsend's attached-eddy model (AEM) is one of the most widely used models in explaining and predicting the logarithmic region of wall turbulence. Townsend pioneered the postulate that wall-attached eddies exhibit self-similar velocity distributions. This premise has led to the derivation of velocity variance scalings in the logarithmic region. In particular, the attached eddies have been extracted at moderate scales and have been illustrated to contain the most kinetic energies in the logarithmic region. In the present contribution, we derive analytically the scalings of the moments of velocity gradients of attached eddies by using the AEM. The direct numerical simulation data with the moderate-scale extraction of attached eddies show good agreement with the derived scalings. Moreover, the contributions of different-scale structures to the moments of velocity gradients are compared, showing that the wall scalings of all-scale velocity gradients are interestingly half of moderate-scale attached eddies. This also indicates the non-negligible influence of the small-scale eddies on the velocity gradients in the logarithmic region. In addition, there are departures in the moments of velocity Hessian, inspiring future improvement in the extraction method of attached eddies.","PeriodicalId":20160,"journal":{"name":"Physical Review Fluids","volume":"64 1","pages":""},"PeriodicalIF":2.7,"publicationDate":"2024-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142210850","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Slip-induced odd viscous flow past a cylinder 滑动引起的流经圆柱体的奇异粘性流

IF 2.7 3区物理与天体物理

Physical Review Fluids Pub Date : 2024-09-03 DOI: 10.1103/physrevfluids.9.094101

Ruben Lier

引用次数: 0