نتایج جستجو برای: dimensional flow

تعداد نتایج: 854321  

Journal: :iranian journal of science and technology (sciences) 2015
z. abbas

the aim of present paper is to provide mathematical modelling for the two-dimensional mhd flow with induced magnetic field. the flaws in the already existing equations have been pointed out. the results of low magnetic reynolds number approximation are recovered as a special case from the developed equations. as an example, the peristaltic flow for a couple stress fluid in a channel is consider...

Journal: :journal of agricultural science and technology 2010
m. m. ahmadi s. a. ayyoubzadeh m. montazeri namin j. m. v. samani

the purpose of this paper is to present a 2d depth-averaged model for simulating and examining unsteady flow patterns in open channel bends. in particular, this paper proposes a 2d depth-averaged model that takes into account the influence of the secondary flow phenomenon through calculation of the dispersion stresses. the dispersion terms which arose from the integration of the product of the ...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه صنعتی امیرکبیر(پلی تکنیک تهران) - دانشکده عمران و محیط زیست 1387

پیش بینی الگوی جریان در سازه آبگیر جانبی با توجه به کاربرد زیاد آن در صنعت آب حایز اهمیت خاصی می باشد. در سال های اخیر مدلسازی عددی این جریان مورد توجه بسیاری از محققین قرار گرفته است. با توجه به الگوی سه بعدی جریان در سازه های آبگیر جانبی، در این تحقیق نتایج مدل های سه بعدی در حالات مختلف مورد بررسی قرار گرفته است. در ابتدا مدل سه بعدی mike3 انتخاب شده و نتایج حاصل از آن با نتایج آزمایشگاهی مو...

ژورنال: مواد پرانرژی 2018

In this study, different flow analysis models in solid rocket motor are introduced. Amongst these models, some are not capable of predicting the effects of significant phenomena such as erosive burning and longitudinal acceleration. In order to consider these effects on the internal ballistic, a quasi-one-dimensional model was developed which employs generalized flow equations. A non-viscous an...

Ail A. Rostami, and M. R. Khosravi,

Natural convection between vertical parallel plates occurs frequently in applications such as solar collectors and cooling of electronic instruments. The problem is a two dimensional developing buoyant flow. In this work, the two dimensional conservation equations are solved numerically for constant wall temperature and constant wall heat flux. The results for the local Nusselt number at the du...

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: :مدیریت آب و آبیاری 0
قاسم میرزائی کارشناس ارشد سازه های آبی، دانشکدۀ کشاورزی، دانشگاه تربیت مدرس، تهران، ایران جمال محمد ولی سامانی استاد گروه مهندسی سازه های آبی، دانشکدۀ کشاورزی، دانشگاه تربیت مدرس، تهران، ایران مهدی مظاهری استادیار گروه مهندسی سازه های آبی، دانشکدۀ کشاورزی، دانشگاه تربیت مدرس، تهران، ایران

flood flow importance enforces we to simulate its components exactly. in this study, saint-venant equations in conservative form are usedto simulate one-dimensional rapidly varied flow in the river. upstream methods of godunov family in finite volume frame work are used to numerical solution. according to flow conditions in the river, the equations used are included in the source term of the be...

The flow field, velocity and pressure coefficient distribution of some 2-D ideal flows are presented. Conformal mapping is used to simulate two-dimensional ideal flow for a variety of complex internal and external configurations, based on the numerical integration of Schwarz-Christoffel transformation. The advantages of this method are simplicity and high accuracy. The method presented in this ...

Hooman Naimi Mehrdad Raisee

The present paper deals with the prediction of three-dimensional fluid flow and heat transfer in rib-roughened ducts of square cross-section. Such flows are of direct relevance to the internal cooling system of modern gas turbine blades. The main objective is to assess how a recently developed variant of a cubic non-linear model (proposed by Craft et al. (1999)), that has been shown to produce ...

Ail A. Rostami, and M. R. Khosravi,

Natural convection between vertical parallel plates occurs frequently in applications such as solar collectors and cooling of electronic instruments. The problem is a two dimensional developing buoyant flow. In this work, the two dimensional conservation equations are solved numerically for constant wall temperature and constant wall heat flux. The results for the local Nusselt number at the du...

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