CFD Analysis for Aerodynamic Performance Optimization of a Vertical Axis Helical Wind Turbine Using Rigid PVC by Outar Hamza, Ennadafy Hamza, Jammoukh Mustapha, El Khaili Mohamed

“…The number of wind turbines being installed around the world is growing rapidly, and research into the aerodynamics of wind turbines has become highly specialised. Computational fluid dynamics (CFD) is used to analyse the effect of loads on the aerodynamic performance of wind turbines. …”
Get full text

Numerical characterization of hemodynamics conditions near aortic valve after implantation of left ventricular assist device by Annalisa Quaini, Sunčica Čanić, David Paniagua

“…The use of LVADs has been associated with thrombus formation next to the aortic valve and close to the anastomosis region,especially in patients in which the native cardiac function isnegligible and the aortic valve remains closed.Stagnation points and recirculation zones have been implicated as the main fluid dynamics factors contributing to thrombus formation.The purpose of the present study was to develop and use computer simulations based on afluid-structure interaction (FSI) solver to study flow conditions corresponding to different strategies inLVAD ascending aortic anastomosis providing a scenario with the lowest likelihood of thrombus formation.A novel FSI algorithm was developed to dealwith the presence of multiple structures corresponding to different elastic properties ofthe native aorta and of the LVAD cannula.A sensitivity analysis of different variables was performed to assess their impact of flow conditionspotentially leading to thrombus formation.It was found that the location of the anastomosis closest to the aortic valve(within 4 cm away from the valve)and at the angle of 30$^\circ$ minimizes the likelihood of thrombus formation.Furthermore, it was shownthat the rigidity of the dacron anastomosis cannula plays almost no role in generating pathologicalconditions downstream from the anastomosis.Additionally, the flow analysis presented in this manuscriptindicates that compliance of the cardiovascular tissue acts as a natural inhibitor of pathological flow conditions conducive to thrombus formationand should not be neglected in computer simulations.…”
Get full text

Numerical Optimization of the Hydraulic and Hemolytic Performance of a Centrifugal Ventricular Assist Device Based on Impeller Flow Passage and Outlet Geometry by Reza Sahebi-Kuzeh Kanan, Hanieh Niroomand-Oscuii, Habib Badri Ghavifekr, Farzan Ghalichi, Kohyar Yazdanpanah-Ardakani

“…This pump has been simulated using computational fluid dynamics used the Ansys CFX 17. Finally, the appropriate pump has been selected for low hemolysis index (HI). …”
Get full text

Simulation Study on Dynamics of Hydraulic Turbines Used in Drilling Engineering by Yijin Zeng, Jin Wang, Shidong Ding, Haobo Zhou, Yanbin Zang, Fangtao Li

“…Using the CFD (computational fluid dynamics) method, based on the realizable k-ɛ turbulence model and Euler multiphase flow model, the effects of different external loads, blade numbers, blade installation angles, and flow rates on the force condition of turbine and the influence of different solid contents, particle sizes, and densities on turbine performance were studied. …”
Get full text

Investigating the effect of cold fluid flow direction used in the outer tube on heat transfer and hot fluid pressure drop in the inner tube by numerical method by Karrar A. Hammoodi, Rassol H. Rasheed, Seyyed Amirreza Abdollahi, Taher Yousefzadeh Adeli, Seyyed Faramarz Ranjbar, Amin Hadidi, Seyed Hossein Hashemimian, Pooya Pasha

“…This paper employs computational fluid dynamics to analyze how nanohybrid fluid influences heat transmission numerically. …”
Get full text

Dynamic regimes in planetary cores: $\tau $–$\ell $ diagrams by Nataf, Henri-Claude, Schaeffer, Nathanaël

“…Planetary cores are the seat of rich and complex fluid dynamics, in which the effects of rotation and magnetic field combine. …”
Get full text

Multiobjective Optimization Design and Experimental Investigation on the Axial Flow Pump with Orthogonal Test Approach by Yuquan Zhang, Yanhe Xu, Yuan Zheng, E. Fernandez-Rodriguez, Aoran Sun, Chunxia Yang, Jue Wang

“…A multiobjective optimization technique based on the computational fluid dynamics (CFD) simulations and the orthogonal test is proposed to reduce the pressure pulsation in this paper. …”
Get full text

Pedestrian Exposure to Air Pollution in Cities: Modeling the Effect of Roadside Trees by Jorge Humberto Amorim, Joana Valente, Pedro Cascão, Vera Rodrigues, Cláudia Pimentel, Ana I. Miranda, Carlos Borrego

“…Spatial distribution of CO concentration is simulated with a computational fluid dynamics (CFD) model. An exposure model is developed that associates the georeferenced location of the student with the computed air quality levels (at an average breathing height) for that specific grid cell. …”
Get full text

Design of Negative Pressure Spiral Feeding Device for Tangential and Longitudinal Axial Intersection of Combine Harvester by Zhong Tang, Xiyao Li, Xinda Chen, Yang Chen

“…The primary objective of this paper was to design a negative pressure spiral feeding device by CFD (computational fluid dynamics). The negative pressure spiral feeding combined structure of the tangential threshing cylinder and longitudinal axial threshing cylinder was established by Pro/E software. …”
Get full text

Three-Dimensional Modeling of Hydrodynamics and Biokinetics in EGSB Reactor by Jixiang Yang, Yanqing Yang, Xin Ji, Youpeng Chen, Jinsong Guo, Fang Fang

“…A three-dimensional model integrating computational fluid dynamics (CFD) and biokinetics was established to model an expanded granular sludge bed (EGSB) reactor in this study. …”
Get full text

Analysis of Effective Operation Performance of Wireless Control Downhole Choke by Yukun Fu, Huiyun Ma, Chenggang Yu, Liangliang Dong, Yunshan Yang, Xiaohua Zhu, Hanwen Sun

“…Based on computational fluid dynamics (CFD) theory, the flow field of downhole throttle is simulated numerically to study the flow resistance characteristics of wireless control downhole throttle and the stability of flow field at signal receiver. …”
Get full text

Numerical Studies of the Gas-Solid Hydrodynamics at High Temperature in the Riser of a Bench-Scale Circulating Fluidized Bed by Maximilian J. Hodapp, Jhon J. Ramirez-Behainne, Milton Mori, Leonardo Goldstein

“…In this work the computational fluid dynamics (CFD) technique was used for modeling and simulation of the hydrodynamics of a preheating gas-solid flow in a cylindrical bed section. …”
Get full text

Validation of NEPTUNE-CFD Two-Phase Flow Models Using Experimental Data by Jorge Pérez Mañes, Victor Hugo Sánchez Espinoza, Sergio Chiva Vicent, Michael Böttcher, Robert Stieglitz

“…Due to the coupling of heat conduction solver SYRTHES with NEPTUNE-CFD, the description of the coupled fluid dynamics and heat transfer between the fuel rod and the fluid is improved significantly. …”
Get full text

Immobilized Native Bacteria as a Tool for Bioremediation of Soils and Waters: Implementation and Modeling by C. Lobo, M. Sanchez, C. Garbi, E. Ferrer, M.J. Martinez-Iñigo, J.L. Allende, C. Martinez, L. Casasas, R. Alonso, A. Gibello, M. Martin

“…A model was developed to understand and predict the behavior of bacteria and pollutants in a bioremediation system, taking into account fluid dynamics, molecular/cellular scale processes, and biofilm formation.…”
Get full text

Effects of uncertainty in the design parameters during the design of horizontal gravity oil, gas and water separators by Abubakar Juma Chilala, Milan Stanko, Oras J. Mkinga

“…The industry employs mechanistic models, empirical correlations, numerical studies using Computational Fluid Dynamics, and extensive and expensive experimental campaigns with separator prototypes. …”
Get full text

Wind Excited Action around Tall Building Having Different Corner Configurations by Rahul Kumar Meena, Ritu Raj, S. Anbukumar

“…Although analysis was performed on various plan shapes of tall buildings using the computational fluid dynamics technique through k-ε turbulence model, a very small number of studies were performed on particular shapes with different corners having same plan area and height. …”
Get full text

Dynamic Simulation of a Warship Control Valve Based on a Mechanical-Electric-Fluid Cosimulation Model by Jiazhen Han, Yudong Xie, Yong Wang, Qixian Wang

“…Conventionally, the interaction effect of the valve mechanical and electric components on the valve chamber’s flow field cannot be considered in computational fluid dynamics (CFD) simulations, so the oscillating fluid loads cannot be accurately obtained. …”
Get full text

A Study of the Motion Response of Floating Solar PV and Cross-Flow Savonius Turbine in Moored Conditions by Ramsy de Fretes Patrick, Izzuddin Jifaturrohman Mohammad, Putranto Teguh, Aria Pria Utama I Ketut, Huang Luofeng

“…Utilizing a catenary mooring system consisting of anchors, mooring lines, floats, and connectors, the study evaluates various configurations to determine the optimal solution for enhanced motion stability. Computational Fluid Dynamics (CFD) simulations are employed to analyze the dynamic response of FPV systems under different environmental conditions, represented on a sea-state scale, with a focus on pure oscillatory motions: heave, roll, and pitch. …”
Get full text

Impinging Performance of High-Pressure Water Jets Emitting from Different Nozzle Orifice Shapes by Fei Huang, Jianyu Mi, Dan Li, Rongrong Wang

“…Additionally, the computational fluid dynamics (CFD) method was also applied to study the velocity distribution. …”
Get full text

Patient-specific computational simulation of coronary artery bypass grafting. by Wei Wu, Anastasios Nikolaos Panagopoulos, Charu Hasini Vasa, Mohammadali Sharzehee, Shijia Zhao, Saurabhi Samant, Usama M Oguz, Behram Khan, Abdallah Naser, Khaled M Harmouch, Ghassan S Kassab, Aleem Siddique, Yiannis S Chatzizisis

“…Furthermore, we performed multiscale computational fluid dynamics simulations of pre- and post-CABG under simulated resting and hyperemic conditions in n = 2 patient-specific anatomies 3D reconstructed from coronary computed tomography angiography. …”
Get full text