نتایج جستجو برای: flow friction factors

تعداد نتایج: 1559811  

Journal: :مکانیک سیالات و آیرودینامیک 0
اصغر دشتی رحمت آبادی محسن نکوئی مهر محمد سفید

in this paper, static performance characteristics for a finite lenght two-lobe journal bearing lubricated with micropolar fluid is studied. using finite element method, steady-state film pressure is obtained by solving modified reynolds equation, based on micropolar lubrication theory. with the help of film pressure in bearing, the static performance characteristics in terms of load carrying ca...

Aghajani Derazkola, H., Elyasi, M. , Hosseinzadeh, M. ,

In this study, the effects of linear speed and rotational speed of the friction stir welding tool was investigated on the heat generation and distribution of heat,the material flow and weld defect formation of the Polyamide 6 (PA6) workpiece. The commercial CFD Fluent 6.4 software package was used to the simulation of the process with computational fluid dynamic technique. The output results of...

2014
Somchai Sriyab

The flow of blood in narrow arteries with bell-shaped mild stenosis is investigated that treats blood as non-Newtonian fluid by using the K-L model. When skin friction and resistance of blood flow are normalized with respect to non-Newtonian blood in normal artery, the results present the effect of stenosis length. When skin friction and resistance of blood flow are normalized with respect to N...

2007
Alison C. Dunn Benjamin G. Keselowsky Gregory Sawyer

Arterial stent deployment by balloon or selfexpandable structure introduces shear forces and radial forces that can damage or remove the endothelial cell layer. These factors can subsequently cause failure by restenosis or endothelial leaks. These conditions can be exacerbated by pulsatile blood flow and arterial asymmetry, which can cause migration or displacement. In mechanical or finiteeleme...

Aghajani Derazkola, H., Elyasi, M. , Hosseinzadeh, M. ,

In this study, the effects of linear speed and rotational speed of the friction stir welding tool was investigated on the heat generation and distribution of heat,the material flow and weld defect formation of the Polyamide 6 (PA6) workpiece. The commercial CFD Fluent 6.4 software package was used to the simulation of the process with computational fluid dynamic technique. The output results of...

Journal: :Journal of the Brazilian Society of Mechanical Sciences 1999

Journal: :international journal of energy and environmental engineering 2011
s hossainpour r hassanzadeh

this paper presents a three-dimensional numerical investigation carried out in turbulent forced convection in a tube with helical ribs. enhancement of heat transfer using helically corrugated tubes has beenstudied experimentally by many researchers but there exist a few published numerical analyses results. the paper also introduces the results of heat transfer and friction factor data for inco...

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