نتایج جستجو برای: Surface heat flux boundary conditions

تعداد نتایج: 1736634  

Journal: :international journal of advanced design and manufacturing technology 0
mohsen dashti ardakani seyd mohammad mehdi mizanadl

abstract: in this paper, a new population-based search called the bees algorithm (ba) is presented to estimate the time-dependent heat transfer coefficient and the corresponding heat flux at the boundaries of a two-dimensional body subjected to transient heat conduction, using the temperature measurements at discrete nodal locations on the boundaries, where heat flux is specified as the boundar...

Journal: :international journal of advanced design and manufacturing technology 0
mohammad mohammadiun islamic azad university, shahrood, iran

in this paper, the conjugate gradient method coupled with adjoint problem is used in order to solve the inverse heat conduction problem and estimation of the time- dependent heat flux using the temperature distribution at a point in a three layer system with none homogeneous boundary conditions. also, the effect of noisy data on final solution is studied. for solving this problem the general co...

2012
Wei Liu

In order to understand a heat transfer phenomenon, it is sometimes very important to know the change in heat flux and temperature with time or the distribution of the heat flux and temperature on the surface of a heating block. Furthermore, with the development of computational thermal-fluid dynamics, experimental data that are of the CFD level, both spatially and temporally, are needed to vali...

Journal: :international journal of advanced design and manufacturing technology 0
mehdi ghannad shahrood university of technology mohammad parhizkar yaghoobi shahrood university of technology

in this paper, a thermoelasticity solution for steady state response of thick cylinders which are subjected to pressure and external heat flux in inner surface is presented. displacement field obeys the kinematics of the first order shear deformation theory (fsdt). it is assumed that the temperature varies both along the length and the thickness. the variation of the temperature occurs linearly...

Journal: :Physical review. E, Statistical, nonlinear, and soft matter physics 2014
S V Nedea A A van Steenhoven A J Markvoort P Spijker D Giordano

The influence of gas-surface interactions of a dilute gas confined between two parallel walls on the heat flux predictions is investigated using a combined Monte Carlo (MC) and molecular dynamics (MD) approach. The accommodation coefficients are computed from the temperature of incident and reflected molecules in molecular dynamics and used as effective coefficients in Maxwell-like boundary con...

2006
B. Firoozabadi H. Emdad

Heat transfer in a porous medium over a stretching surface with injection or suction is studied. Two standard kinds of thermal boundary conditions are used for the surface. Isothermal and Iso-flux boundary conditions for the stretching surface are two standard boundary conditions which are used and discussed in the present work. Brinkman model is used for the medium. The governing equations are...

The effect of partial slip and temperature dependent fluid properties on the MHD mixed convection flow from a heated, non-linearly stretching surface in the presence of radiation and non-uniform internal heat generation/absorption is investigated. The velocity of the stretching surface was assumed to vary according to power-law form. Thermal transport is analyzed for two types of non-isothermal...

2017
Toby W. Meierbachtol Joel T. Harper Jesse V. Johnson Neil F. Humphrey Douglas John Brinkerhoff Douglas J. Brinkerhoff

The surface and basal boundary conditions exert an important control on the thermodynamic state of the Greenland Ice Sheet, but their representation in numerical ice sheet models is poorly constrained due to the lack of observations. Here we investigate a land-terminating sector of western Greenland and (1) quantify differences between new observations and commonly used boundary condition data ...

2007
Elfatih A. B. Eltahir Ralph M. Parsons

This paper presents a hypothesis regarding the fundamental role of soil moisture conditions in land-atmosphere interactions. We propose that wet soil moisture conditions over any large region should be associated with relatively large boundary layer moist static energy, which favors the occurrence of more rainfall. Since soil moisture conditions themselves reflect past occurrence of rainfall, t...

Journal: :international journal of industrial mathematics 0
m. abd el-aziz king khaled university, faculty of science, mathematics department, abha 9004, saudi ‎arabia‎‎. department of mathematics, faculty of science, helwan university, cairo, egypt p. o. box 1179‎5‎‎‎.

the effect of partial slip and temperature dependent fluid properties on the mhd mixed convection flow from a heated, non-linearly stretching surface in the presence of radiation and non-uniform internal heat generation/absorption is investigated. the velocity of the stretching surface was assumed to vary according to power-law form. thermal transport is analyzed for two types of non-isothermal...

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