نتایج جستجو برای: computational fluid dynamic cfd

تعداد نتایج: 856193  

Journal: :international journal of nano dimension 0
s. asadi department of mechanical engineering, payame noor university, tehran, iran.

a novel computational fluid dynamics and molecular kinetic theory (cfd-mk) method was developed to simulate the impingement of a nanodroplet onto a solid surface. a numerical solution of the navier–stokes equation using a volume-of-fluid (vof) technique was used to model nanodroplet deformation. dynamic contact angle during droplet impact was obtained by molecular kinetic theory. this dynamic c...

Journal: :فصلنامه علمی پژوهشی مهندسی مکانیک جامدات واحد خمینی شهر 0
hamed aghajani derazkola islamic azad university, science and research branch, young researchers and elite club, tehran, iran

in this study, the effects of linear and rotational speed of the friction stir welding tool was investigated on the heat generation and distribution at surface and inside of workpiece, material flow and geometry of the welding area of poly methyl methacrylate (pmma) workpiece. the commercial cfd fluent 6.4 software was used to simulation of the process with computational fluid dynamic technique...

Journal: :basic and clinical neuroscience 0
nafiseh masoumi chemical & petroleum engineering department, sharif university of technology, tehran, iran. f. framanzad biomechanics group faculty, mechanical engineering department, iranian university of science and technology, tehran, iran. behnam zamanian department of chemical engineering, north eastern university, boston, ma,usa. a.s. seddighi neurosurgery department, shohada-e-tajrish hospital, shahidbeheshti university of medical sciences, tehran, iran. m.h. moosavi biomedical engineering, amirkabir university of technology, tehran, iran. s. najarian faculty of biomedical engineering, amirkabir university of technology, tehran, iran.

many diseases are related to cerebrospinal .uid (csf) hydrodynamics. therefore, understanding the hydrodynamics of csf .ow and intracranial pressure is helpful for obtaining deeper knowledge of pathological processes and providing better treatments. furthermore, engineering a reliable computational method is promising approach for fabricating in vitro models which is essential for inventing gen...

A novel computational fluid dynamics and molecular kinetic theory (CFD-MK) method was developed to simulate the impingement of a nanodroplet onto a solid surface. A numerical solution of the Navier–Stokes equation using a volume-of-fluid (VOF) technique was used to model nanodroplet deformation. Dynamic contact angle during droplet impact was obtained by molecular kinetic theory. This dynamic c...

A novel computational fluid dynamics and molecular kinetic theory (CFD-MK) method was developed to simulate the impingement of a nanodroplet onto a solid surface. A numerical solution of the Navier–Stokes equation using a volume-of-fluid (VOF) technique was used to model nanodroplet deformation. Dynamic contact angle during droplet impact was obtained by molecular kinetic theory. This dynamic c...

Journal: :iranian journal of radiology 0
ali sarrami-foroushani department of chemical engineering, isfahan university of technology, isfahan, iran mohsen nasr esfahany department of chemical engineering, isfahan university of technology, isfahan, iran; department of chemical engineering, isfahan university of technology, isfahan, iran. tel: +98-3133915631, fax: +98-3113912677 hamidreza saligheh rad medical physics and biomedical engineering, tehran university of medical sciences, tehran, iran kavous firouznia advanced diagnostic and interventional radiology research center (adir), tehran university of medical sciences, tehran, iran madjid shakiba advanced diagnostic and interventional radiology research center (adir), tehran university of medical sciences, tehran, iran hossein ghanaati advanced diagnostic and interventional radiology research center (adir), tehran university of medical sciences, tehran, iran

conclusion results reinforced the pivotal role of vascular geometry, with respect to hemodynamics, together with the importance of performing patient-specific cfd analyses, through which the effect of different blood flow conditions on the aneurysm hemodynamics could be evaluated. objectives this study aimed to investigate the effects of variations in heart rate and internal carotid artery (ica...

Journal: :journal of applied research in water and wastewater 2014
hossein bonakdari gislain lipeme-kouyi girdhari lal asawa

the developing turbulent flow in an open channel is a complex three-dimensional flow influenced by the secondary currents and free surface effects and is, therefore, not amenable to analytical solution. this paper aims to study the impact of three key hydraulic parameters (relative roughness, the froude number and the reynolds number) on the establishment length using computational fluid dynami...

Journal: :journal of chemical and petroleum engineering 2014
fariborz taghipour farkhondeh ghaderzadeh seyed hassan hashemabadi

in this study, a computational fluid dynamics (cfd) model was developed to evaluate ultraviolet disinfection applesauce reactor. to simulate uv reactors, three sets of equations, including hydrodynamics, radiation and species mass conservation were solved simultaneously. the realizable k-e turbulence model and the discrete ordinate method were used to find the uv radiation profile through the r...

2014
Koushik Ponnuru Jincheng Wu Preeti Ashok Emmanuel S. Tzanakakis Edward P. Furlani

An analysis of the effects of the turbulent shear stress on cell culture in a stirred tank microcarrier bioreactor system using a synergistic combination of computational fluid dynamic (CFD)-based simulations and experiments is presented. A 3D computational model of Corning’s benchscale spinner flask was built using a state-of-the-art computational fluid dynamics (CFD) software, Flow3D (www.flo...

2003
Kerem Pekkan

A Cartesian grid generation methodology is developed for unsteady control volume computational fluid dynamic (CFD) solvers. Arbitrary combinations and numbers of moving and stationary boundaries are allowed to exist in the two-dimensional Cartesian grid template. Specific definitions for the possible cases, CFD solver requirements and moving geometry handling algorithms of Cartesian grids are d...

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