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Old   December 26, 2006, 03:10
Default calculating temp
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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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Old   December 26, 2006, 05:07
Default Re: calculating temp
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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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Old   December 26, 2006, 08:18
Default Re: calculating temp
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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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Old   December 26, 2006, 08:53
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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.



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