Journal of Fluids Engineering-Transactions of the Asme最新文献_第6页

Sloshing of Fluid Between Rotating Inner Vertical Shaft and Stationary Outer Casing 旋转的内立轴与静止的外壳之间流体的晃动

IF 2 3区工程技术

Journal of Fluids Engineering-Transactions of the Asme Pub Date : 2021-08-12 DOI: 10.1115/1.4052127

K. Yonezawa, Kosuke Nishimura, T. Sano, K. Miyagawa, Y. Tsujimoto

引用次数: 1

Mitigation of Antisymmetric Mode and Drag with Base Cavities 基底空腔的反对称模态和阻力缓解

IF 2 3区工程技术

Journal of Fluids Engineering-Transactions of the Asme Pub Date : 2021-08-09 DOI: 10.1115/1.4052047

M. Viji, Srinivas Nistala Vikramaditya

引用次数: 0

Isentropic Compressor Efficiency Calculation Method for Small Gasoline Engine Turbocharger Using Supplier Performance Maps 基于供应商绩效图的小型汽油机涡轮增压器等熵压缩机效率计算方法

IF 2 3区工程技术

Journal of Fluids Engineering-Transactions of the Asme Pub Date : 2021-08-09 DOI: 10.1115/1.4052044

G. Salameh, G. Goumy, P. Chessé

引用次数: 1

Definition and Validation of Cavitating Rocket Turbopump Transmission Matrices for Modular Multi Actuator Disk Approach 模块化多作动盘法空化火箭涡轮泵传动矩阵的定义与验证

IF 2 3区工程技术

Journal of Fluids Engineering-Transactions of the Asme Pub Date : 2021-08-09 DOI: 10.1115/1.4052045

Luca Sales, A. Pasini

引用次数: 1

A Numerical Model for the Analysis of the Locomotion of a Cownose Ray 牛鼻射线运动分析的数值模型

IF 2 3区工程技术

Journal of Fluids Engineering-Transactions of the Asme Pub Date : 2021-08-09 DOI: 10.1115/1.4052048

G. Bianchi, S. Cinquemani, P. Schito, F. Resta

引用次数: 5

On Offset Placement of a Compound Droplet in a Channel Flow 通道流中复合液滴的偏移放置

IF 2 3区工程技术

Journal of Fluids Engineering-Transactions of the Asme Pub Date : 2021-08-09 DOI: 10.1115/1.4052052

Jagannath Mahato, D. Srivastava, D. K. Chandraker, R. Lakkaraju

引用次数: 1

Rheological and Biophysical Properties of Living Fluids Under Shear: Active Suspensions of Synechocystis sp. CPCC 534 剪切作用下活体流体的流变学和生物物理性质:聚囊藻活性悬浮液

IF 2 3区工程技术

Journal of Fluids Engineering-Transactions of the Asme Pub Date : 2021-08-09 DOI: 10.1115/1.4052053

Malih Mehdizadeh-Allaf, Zahra Habibi, J. R. Bruyn, C. DeGroot, H. Peerhossaini

{"title":"Rheological and Biophysical Properties of Living Fluids Under Shear: Active Suspensions of Synechocystis sp. CPCC 534","authors":"Malih Mehdizadeh-Allaf, Zahra Habibi, J. R. Bruyn, C. DeGroot, H. Peerhossaini","doi":"10.1115/1.4052053","DOIUrl":"https://doi.org/10.1115/1.4052053","url":null,"abstract":"In this study, we focus on the response of biological, rheological, and physical properties of dilute suspensions of cyanobacterium Synechocystis sp. CPCC 534 to shear induced by stirring. Experiments were carried out at three different stirring rates in well-controlled conditions, and the results are compared with stationary conditions where only molecular diffusion and cell motility govern the transport phenomena and cell growth. Our results show that the growth, biomass, total chlorophyll, and carotenoid production of Synechocystis sp. under various shear conditions were improved signiﬁcantly, and the yield was nearly doubled. The viscosity of Synechocystis suspensions, subjected to different shear rates, was also measured. The data showed Newtonian behavior for suspensions at different cell concentrations. Cell concentration showed a noticeable increase in the viscosity of suspensions. However, we observed that this increase was smaller than the one predicted for a suspension of hard spheres. Addition of shear to the cyanobacterium Synechocystis sp. culture demonstrated a positive impact on the produc- tion of value-added products from the micro-organism. The obtained results can be used to improve the bioreactor design for better productivity. [DOI: 10.1115/1.4052053]","PeriodicalId":54833,"journal":{"name":"Journal of Fluids Engineering-Transactions of the Asme","volume":null,"pages":null},"PeriodicalIF":2.0,"publicationDate":"2021-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84867499","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Flow and Energy Loss Downstream of Rectangular Sharp-Crested Weirs for Free and Submerged Flows 矩形尖顶堰下游自由和淹没水流的流量和能量损失

IF 2 3区工程技术

Journal of Fluids Engineering-Transactions of the Asme Pub Date : 2021-08-09 DOI: 10.1115/1.4052049

M. Amin, N. Rajaratnam, D. Zhu

引用次数: 0

Message Passing Interface Parallelization for Two-Way Coupled Euler-Lagrange Simulation of Microbubble Enhanced HIFU. 微泡增强HIFU双向耦合欧拉-拉格朗日模拟的消息传递接口并行化。

IF 2 3区工程技术

Journal of Fluids Engineering-Transactions of the Asme Pub Date : 2021-08-01 Epub Date: 2021-06-07 DOI: 10.1115/1.4051148

Jingsen Ma, Aswin Gnanaskandan, Chao-Tsung Hsiao, Georges L Chahine

{"title":"Message Passing Interface Parallelization for Two-Way Coupled Euler-Lagrange Simulation of Microbubble Enhanced HIFU.","authors":"Jingsen Ma, Aswin Gnanaskandan, Chao-Tsung Hsiao, Georges L Chahine","doi":"10.1115/1.4051148","DOIUrl":"https://doi.org/10.1115/1.4051148","url":null,"abstract":"<p><p>Microbubble enhanced high intensity focused ultrasound (HIFU) is of great interest to tissue ablation for tumor treatment such as in liver and brain cancers. To accurately characterize the acoustic and thermal fields during this process, a coupled Euler-Lagrange model is used. The ultrasound field is modeled using compressible Navier-Stokes equations on an Eulerian grid, while the microbubbles are tracked in a Lagrangian fashion. The coupling is realized through the void fraction computed from the instantaneous bubble volumes. To speed up the computations, an message passing interface parallelization scheme based on domain decomposition is herein proposed. During each time-step, message passing interface processors, each handling one subdomain, are first used to execute the fluid computation, and then the bubble computations. This is followed by the coupling procedure. The coupling is challenging as the effect of the bubbles through the void fraction at an Eulerian point near a subdomain border will require information from bubbles located in different subdomains, and vice versa. This is addressed by a special utilization of ghost cells surrounding each fluid subdomain, which allows bubbles to spread their void fraction effects across subdomain edges without the need of exchanging directly bubble information between subdomains and significantly increasing overhead. After a careful verification of gas effects conservation, this parallelization scheme is validated and illustrated on a typical microbubble enhanced HIFU problem, followed by parallelization scaling tests and efficiency analysis.</p>","PeriodicalId":54833,"journal":{"name":"Journal of Fluids Engineering-Transactions of the Asme","volume":null,"pages":null},"PeriodicalIF":2.0,"publicationDate":"2021-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8299801/pdf/fe-20-1739_081105.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"39272356","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Wall Effects on the Flow Dynamics of a Rigid Sphere in Motion 运动中刚性球体流动动力学的壁面效应

IF 2 3区工程技术

Journal of Fluids Engineering-Transactions of the Asme Pub Date : 2021-08-01 DOI: 10.1115/1.4051215

Z. Feng, J. Gatewood, E. Michaelides

{"title":"Wall Effects on the Flow Dynamics of a Rigid Sphere in Motion","authors":"Z. Feng, J. Gatewood, E. Michaelides","doi":"10.1115/1.4051215","DOIUrl":"https://doi.org/10.1115/1.4051215","url":null,"abstract":"\u0000 The presence of a wall near a rigid sphere in motion is known to disturb the particle fore and aft flow-field symmetry and to affect the hydrodynamic force. An immersed boundary direct numerical simulation (IB-DNS) is used in this study to determine the wall effects on the dynamics of a free-falling sphere and the drag of a sphere moving at a constant velocity. The numerical results are validated by comparison to the published experimental, numerical, and analytical data. The pressure and velocity fields are numerically computed when the particle is in the vicinity of the wall; the transverse (lift) and longitudinal (drag) parts of the hydrodynamic force are calculated; its rotational velocity is investigated in the case of a free-falling sphere. The flow asymmetry also causes the particle to rotate. The wall effect is shown to be significant when the dimensionless ratio of the wall distance to the particle diameter, L/D, is less than 3. The wall effects are more pronounced and when the particle Reynolds number, Re, is less than 10. Based on the computational results, a useful correlation for the wall effects on the drag coefficients of spheres is derived in the range 0.75 < L/D < 3 and 0.18 < Re < 10.","PeriodicalId":54833,"journal":{"name":"Journal of Fluids Engineering-Transactions of the Asme","volume":null,"pages":null},"PeriodicalIF":2.0,"publicationDate":"2021-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82705751","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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