نتایج جستجو برای: porous artery

تعداد نتایج: 262635  

2016
Ajay Kumar R. S. Chandel Rajesh Shrivastava Keerty Shrivastava Sanjeet Kumar

The purpose of this work is to study the effect of blood flow in an inclined tapered artery under MHD effect through porous medium. Blood is considered as an electrically conducting Newtonian fluid. In this model, the analytical expressions for the volumetric flow rate, pressure gradient, wall shearing stress, and velocity profile have been derived. The problem is described by the usual MHD equ...

2012
G. C. Shit M. Roy A. Sinha

This paper presents a theoretical study of blood flow through a tapered and overlapping stenosed artery under the action of an externally applied magnetic field. The fluid (blood) medium is assumed to be porous in nature. The variable viscosity of blood depending on hematocrit (percentage volume of erythrocytes) is taken into account in order to improve resemblance to the real situation. The go...

Journal: :The Annals of thoracic surgery 2000
R Sodian S P Hoerstrup J S Sperling S H Daebritz D P Martin F J Schoen J P Vacanti J E Mayer

BACKGROUND Tissue engineering is a new approach, whereby techniques are being developed to transplant autologous cells onto biodegradable scaffolds to ultimately form new functional tissue in vitro and in vivo. Our laboratory has focused on the tissue engineering of heart valves, and we have fabricated a trileaflet heart valve scaffold from a biodegradable polymer, a polyhydroxyalkanoate. In th...

Journal: :international journal of maritime technology 0
saeed booshi 424 hafez avenue,, tehran-iran, mohammad javad ketabdari 424 hafez avenue,, tehran-iran,

in this paper wave transformation in a submerged sloped breakwater and its hydraulic performance was simulated by developing a numerical model in fortran. the code was established by combining porous flow and a two-phase model using vof method. modified navier-stokes and k-ε equations implemented to the model to simulate the flow in porous media. cut cell method was modified to simulate fluid t...

Journal: :Seminars in interventional cardiology : SIIC 1996
H H Jasper

Development of the first percutaneous catheters for local delivery is described. Understanding of the mechanisms by which circulating materials gain entrance to the artery wall, and the importance of hypertension in accelerating that process were crucial to the conceptual basis of these devices. The double balloon catheter and the porous balloon catheter were systematically studied to quantify ...

Journal: :journal of ultrafine grained and nanostructured materials 0
reza ansari department of mechanical engineering, university of guilan, p.o.box 3756, rasht, iran. shahram ajori department of mechanical engineering, university of guilan, p.o.box 3756, rasht, iran. sina malakpour department of mechanical engineering, university of guilan, p.o.box 3756, rasht, iran.

importance of covalent bonded two-dimensional monolayer nanostructures and also hydrocarbons is undeniably responsible for creation of new fascinating materials like polyphenylene polymer, a hydrocarbon super honeycomb network, so-called porous graphene. the mechanical properties of porous graphene such as its young’s modulus, poisson’s ratio and the bulk modulus as the determinative properties...

Journal: :international journal of advanced design and manufacturing technology 0
mohammad mehdi keshtksr r. janati far

abstract: this work presents a numerical study to investigate the heat transfer characteristics of a 2-d rectangular composite porous radiant burner (cprb). in the construction of porous burner, the porous layer is considered to be composite consisting of upstream and downstream layers with equal thickness but with different physical and radiative properties. in the present work, a two dimensio...

Journal: :iranian journal of materials science and engineering 0
t. ebrahimi sadrabadi amirabad shomali, tehran, iran s.r. allahkaram amirabad shomali, tehran, iran n. towhidi amirabad shomali, tehran, iran

porous hollow glass microspheres have many uses, including encapsulation of active materials. in this paper a fast and facile method for fabricating porous hollow glass-microspheres was demonstrated by etching them using dilute hydrofluoric acid. then, a highly reactive amine was infiltrated into the etched glass microspheres. scanning electron microscopy was conducted for the hollow glass micr...

Journal: :SN applied sciences 2021

Abstract The present communication presents a theoretical study of blood flow through stenotic artery with porous wall comprising Brinkman and Darcy layers. governing equations describing the subjected to boundary conditions have been solved analytically under low Reynolds number mild stenosis assumptions. Some special cases problem are also presented mathematically. significant effects rheolog...

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