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Conjugate heat transfer problemDear All,
I have a problem where I have a fluid surrounded by different solids and want to solve the heat transfer in the solids. The solids are surrounded by still air and I need to specify the outer boundary as Convection and give the Heat Transfer Coefficient. I can find different normal values by searching but I can see that I get different results depending on which value I use :( The higher heat transfer coefficient I use the more heat flux out of the outer boundary. I don't know what the heat flux should be, but want to find out. How do I determine the correct heat transfer coefficient. Thanks in advance |

Quote:
Typically you' ll find values of about 1 up to 10 W/m2K for air and typical temperature gradients. If you need a more exact value, see textbooks or: Maybe you can enlarge your modell and include the "outer heat transfer" into your model and convert it to an inner one.. |

Dear Volker,
Thanks for your reply. I have been looking in text books, but my geometry is a bit out of the range of standard examples. But I wanted to be sure that I had not overlooked any smart approach, so thanks for the reply. I have now extended the domain such that I have the surrounding air included. I did find a heat transfer coefficent on 8, whcih is within the range you mentioned. Thanks |

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