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December 26, 2006, 02:10 |
calculating temp
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#1 |
Guest
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hii
given an electronic heat transfer source of 29 W, with a air flow of around 2m/s at 25 deg C ambient temperature conditions, how to estimate the surface temp of the component. I am getting temperature of around 136 deg C in a cfd package.The material is of stainless steel. can u comment |
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December 26, 2006, 04:07 |
Re: calculating temp
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#2 |
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assume 1 D in the flow direction,
using q=hA*(delta temp difference between surface and ambient), check whether the 136 degree fits roughly. value of h can be calculated from Nusselt number (you need to estimated whether the flow is laminar or turbulent). To know what i mean exactly,read up your heat transfer by convection theory. |
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December 26, 2006, 07:18 |
Re: calculating temp
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#3 |
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In the CFdesign software, there is a wall calculator which will predict the surface temperatures on all surfaces accurately. If you can give the model to me, I would calculate
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December 26, 2006, 07:53 |
Re: calculating temp
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#4 |
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I would be happy to simulate and compare. However, you will need to post the heat flux and not the heat load in order to setup a comparable model. Also we will need a length scale to determine turbulence effect, i.e. macro-geometric scale, e.g. 1 meter or 1 km.
Regards Q |
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