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May 15, 2013, 04:40 |
Radiation properties with perforated sheet
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#1 |
New Member
Join Date: Apr 2013
Posts: 20
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Hello everybody,
I would like to simulate a heat transfer between two wall: Wall 1: - Hot temperature 473K - Internal emissivity =0,8 (old steel) Wall 2: - Perforated plate (modelized as a plan, without hole) - Distance between the wall 1 = 200mm - Material steel - Internal emissivity = 0,8 The model is a rectangle where: - Side left of rectangle is wall1 - Front face = velocity inlet (2m/s) - Side right = adiabatic wall (should be the air) - back face = pressure outlet (gauge pressure =0) - Top face = adiabatic wall (should be the air) - Bottom face = adiabatic wall (should be the air) - Wall 2 inside the rectangle with coupled BC The purpose of this simulation is to know how the wall 2 is heating by the hot wall I have some questions: 1) Someone could confirmed that as the steel is opaque material, so the absorption (1/m) is equal to the emissivity (0,8) ? (I need the information for discrete ordinate model) 2) My model have a velocity inlet of 2m/s so the simulation is incompressible but when I looked between the static temperature and total temperature the iso contour are different. But they should be the same ? 3) The wall 2 is a perforated sheet, where the flow is passing parallel to the perforated sheet, should I define the perforated sheet as porous jump ? Thancks very much for any answer... Fredom |
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