What is the max free air heat transfer coefficient(film coefficient)?

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SUMMARY

The maximum free air heat transfer coefficient, or film coefficient, at 1000°C is a critical factor in thermal analysis. In the discussion, a user modeled an object at 1000°C with a heat generation load of 900 watts using Solid Edge. They noted that typical air convection values range from 5 to 25 W/m²/K, but to maintain the temperature, a convective film coefficient of 400 W/m²/K was required, raising questions about its feasibility. The consensus indicates that at such high temperatures, radiative heat transfer significantly outweighs convective heat transfer.

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  • Understanding of thermal analysis principles
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  • Knowledge of heat transfer coefficients
  • Basic concepts of radiative and convective heat transfer
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  • Explore advanced thermal analysis techniques in Solid Edge
  • Investigate the effects of varying film coefficients on thermal models
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Engineers, thermal analysts, and researchers involved in high-temperature applications and thermal modeling will benefit from this discussion.

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what is the max free air heat transfer coefficient(film coefficient)? at 1000 c?

i have a object that is at 1000 degree c by applying 900watt. i model it solid edge and apply heat generation load of 900 watt, from what i research air convection is 5-25 w/m^2/k. but when i apply that in the thermal analysis with solid edge. i get a massive number.

it only go back to 1000 degree c by applying convective file coefficient of like 400 w/m^2/k? why is that? is 400 w/m^2/k even possible?
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At 1000 c, radiative heat transfer is going to dominate over convective. Try calculating the heat transfer rate from radiative heat transfer.
 

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