نتایج جستجو برای: wall flow

تعداد نتایج: 634134  

Journal: :international journal of industrial mathematics 0
ar. ‎haghighi‎ department of mathematics, urmia university of technology, urmia, ‎iran. s. asadi ‎chalak‎ department of mathematics, urmia university of technology, urmia, ‎iran.

in the present study, the nonlinear model of non-newtonian blood flow in cosine-shape stenosed elastic artery is numerically examined. the model is carried out for axisymmetric, two-dimensional and fully developed blood flow. the vessel wall is assumed to be have time-dependent radius that is important factor for study of blood flow. the cosine-shape stenosis convert to rigid artery by using a ...

Journal: :AJNR. American journal of neuroradiology 2010
L Goubergrits B Thamsen A Berthe J Poethke U Kertzscher K Affeld C Petz H-C Hege H Hoch A Spuler

BACKGROUND AND PURPOSE Coil embolization procedures change the flow conditions in the cerebral aneurysm and, therefore, in the near-wall region. Knowledge of these flow changes may be helpful to optimize therapy. The goal of this study was to investigate the effect of the coil-packing attenuation on the near-wall flow and its variability due to differences in the coil structure. MATERIALS AND...

Journal: :iranian journal of veterinary research 2014
m. shimizu r. tanaka r. fukushima l. hamabe n. sasaki

mitral valve regurgitation (mvr) is a common valvular disease in dogs. hydrokinetic evaluation of the blood flow within the ventricles has become possible by vector flow mapping (vfm), which shows the blood flow within the ventricles in vector and vortex flows. blood flow within the left ventricle of mvr dogs was compared at different stages of mvr and to that of normal dogs. 14 normal dogs and...

Journal: :medical journal of islamic republic of iran 0
mohammad reza bigdely from the department of microbiology, islamic azad university, zanjan sohrab hajizadeh the department of medical physiology, tarbiat modarres university, tehran saeed shahraz the school of medicine, shahid beheshti university of medical sciences, tehran, l.r. iran.

endothelial nitric oxide synthase (enos) produces nitric oxide (no) from l-arginine and is important for the maintenance of cardiovascular homeostasis. congestive heart failure (chf) generally results in increased pulmonary blood flow and if untreated leads to pulmonary hypertension and end stage heart failure. we therefore hypothesized that increased pulmonary flow without changes in pressure ...

F. Aloui R. Mestiri* S. Ben Nasrallah

The technique used to control the airflow is based on the electro-hydrodynamic actuator which is also called plasma actuator. This actuator ensures the airflow control thanks to the electric wind created by the electrical corona discharge. This ionic wind is developed at the profile surface tangential to the initial free airflow so that it has a significant effect on the boundary layer flow. Th...

A. Fattahi G. A. Sheikhzadeh M. Ebrahim Qomi N. Hajialigol,

The fluid flow and heat transfer in lid-driven enclosures filled with Cu-water nanofluid is numerically investigated. The moving vertical walls of the enclosure  are maintained in a constant temperature, while the horizontal walls are insulated. The hybrid scheme is used to discretize the convection terms and SIMPLER algorithm is adopted to couple the velocity field and pressure in the momentum...

The purpose of this study is to develop a mathematical model for studying the magnetic field effect on blood flow through an axially non-symmetric but radially symmetric atherosclerotic artery. Herschel-Bulkley equation has been taken to represent the non-Newtonian character of blood. The response of magnetic field, stenosis height, shape parameter on velocity, volumetric flow rate in stenotic ...

Journal: :iranian journal of chemistry and chemical engineering (ijcce) 2010
roohollah rafee hassan rahimzadeh

in this paper, the turbulent air droplet flow inside a single passage of a curved type vane separator has been studied numerically. the simulation is based on the eulerian - lagrangian method. for turbulent air flow calculations, a computer code was developed to solve the reynolds averaged navier stokes (rans) equations together with the equations of reynolds stress transport model (rstm) on co...

2005
David C. Homans

To determine whether ischemia in the exercising dog is associated with preservation of subepicardial thickening relative to subendocardial thickening, 10 dogs were chronically instrumented with circumflex artery flow probes, hydraulic occluders, and pairs of ultrasonic microcrystals for determination of wall thickness in the circumflex artery distribution. One pair of crystals spanned the entir...

A. Abbassi H. Safikhani S. Ghanami

In the present study, Computational Fluid Dynamics (CFD) techniques and Artificial Neural Networks (ANN) are used to predict the pressure drop value (Δp ) of Al2O3-water nanofluid in flat tubes. Δp  is predicted taking into account five input variables: tube flattening (H), inlet volumetric flow rate (Qi  ), wall heat flux (qnw  ), nanoparticle volume fraction (Φ) and nanoparticle diameter (dp ...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید