نتایج جستجو برای: peristaltic flow

تعداد نتایج: 483194  

Journal: :Frontiers in Mechanical Engineering 2023

In wide-ranging areas, including hydraulics, biomedical, automotive, and aerospace, there is often a need to move fluid with constant flow rate. This difficult achieve any type of pump usually other elements are inserted regularize the output. study focused on peristaltic because few studies it has some interesting features, such as extreme simplicity, small number components, compactness whole...

Journal: :Lab on a chip 2013
Tohid Fatanat Didar Kebin Li Maryam Tabrizian Teodor Veres

We present an integrated thermoplastic elastomer (TPE) based multilayer microfluidic device with an embedded peristaltic micropump and through-holes membrane for high throughput particle sorting and separation. Fluidic and pneumatic layers of the device were fabricated using hot-embossing lithography and commercially available polycarbonate membranes were succcessfully sandwiched between two th...

Journal: :Pharmacology 2004
Kamel Gharzouli Peter Holzer

Flavonoids are known to relax precontracted intestinal smooth muscle and to delay intestinal transit. We therefore investigated the effects of quercetin, naringenin, apigenin and genistein on intestinal peristalsis in vitro. Peristalsis in fluid-perfused segments of the guinea pig small intestine was recorded through the intraluminal pressure changes associated with the peristaltic waves. Alter...

2017
V. K Ravi Kumar V. A. P. Sastry V. Ramana Murthy

In this article, we have presented a peristaltic flow of third order fluid in a channel with variable viscosity. The governing equations are constructed under long wave length and low Reynolds number approximations. A regular perturbation technique is applied and obtained expressions for the stream function, temperature, and concentration at a small Deborah number. The pertinent features of var...

2015
Saima Noreen Muhammad Qasim Xiao-Dong Wang

In this paper, we study the influence of heat sink (or source) on the peristaltic motion of pseudoplastic fluid in the presence of Hall current, where channel walls are non-conducting in nature. Flow analysis has been carried out under the approximations of a low Reynolds number and long wavelength. Coupled equations are solved using shooting method for numerical solution for the axial velocity...

2004
T. Hayat S. Abelman E. Momoniat F. M. Mahomed

The effect of magnetic field on peristaltic flow through the gap between uniform tubes is studied under the assumption of long wavelength at low Reynolds number. The inner tube is rigid and the outer tube has a sinusoidal wave travelling down its wall. The flow is investigated in a wave frame of reference moving with the velocity of the wave. The analytical solution for velocities and pressure ...

Journal: :The Journal of Automatic Chemistry 1989
Peter D. Wentzell Michael J. Hatton Paul M. Shiundu Ronald M. Ree Adrian P. Wade D. Betteridge Timothy J. Sly

An automated apparatus to assist in the development of analytical continuous flow methods is described. The system is capable of controlling and monitoring a variety of pumps, valves, and detectors through an IBM PC-AT compatible computer. System components consist of two types of peristaltic pumps (including a multiple pump unit), syringe pumps, electrically and pneumatically actuated valves, ...

Journal: :J. Applied Mathematics 2011
V. P. Rathod Rathod S. K. Asha

The Problem of peristaltic transport of a fluid with magnetic fluid with variable viscosity through the gap between coaxial tubes where the outer tube is non-uniform with sinusoidal wave traveling down is wall and the inner tube is rigid. The relation between the pressure gradient, friction force on the inner and outer tube are obtained in terms of magnetic fluid and viscosity. The numerical so...

2012
T. Raghunatha Rao Prasada Rao

The effect of heat transfer on peristaltic flow of a couple stress fluid through a porous medium in a two dimensional flexible channel was studied under long wave length approximation. A Closed form of expressions is derived in terms of wall slope parameter for axial velocity, temperature and heat transfer coefficient using perturbation method. The effects of pertinent parameters of interest on...

2010
Sohail Nadeem Noreen Sher Akbar Muhammad Yousaf Malik

In the present article, we have studied the effects of heat transfer on a peristaltic flow of a magnetohydrodynamic (MHD) Newtonian fluid in a porous concentric horizontal tube (an application of an endoscope). The problem under consideration is formulated under the assumptions of long wavelength and neglecting the wave number. A closed form of Adomian solutions and numerical solutions are pres...

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