Heat transfer analysis of an aluminium sheet

[mina1363]

I am trying to model the heat trasfer in a square Aliminuim sheet. Heat is applied to the sheat from a heater block that is attatched to the Aliminuim sheet in the middle. The power from the heater is 150 W and the sheet is initially at room temperature.I'm not sure about a few things:

1) When I create a step , do I choose General heat transfer as the procedure type? And to define the steps do I choose transient or steady-state?

do I define the initial temperature of the mould?

2) What type of loading do I need to use?

3) How do I apply the heat flux in the middle of the sheet? A surface load? I tried to apply a surface load on the surface of the section of the sheet where the heater is attatched but that didn't work and had to apply body forces!

I am desperate for answers. Thank you very much!

 

[TGS4]

Is this for a school project?

 

[corus]

Look in the interaction module to apply a surface heat flux. You also need to decide what conditions apply to the free surfaces of the sheet. Whether you need a steady state solution or transient is up to what you need from the model.

corus

 

[mina1363]

Thanks Corus! I think I've managed to do it. I am getting an error that says:

NO VALID RADIATION OUTPUT REQUESTS HAVE BEEN GENERATED. THIS MAY BE DUE TO EARLIER INPUT ERRORS OR SPECIFICATION OF A NONEXISTANT CAVITY OR SURFACE NAME

Do you know what it is implying?

 

[corus]

Check the interactions as it sounds like you have defined cavity radiation with incorrect surfaces. Of course if you have a block sat on a plate then you'll need to define an 'open' cavity so that the surface from the block radiates to the free surface of the plate.

corus

 

[mina1363]

I've ignored radiation and am just looking at condution and convection!! The block is sat on the plate, so I've partitioned the Aluminuim sheet so that I can apply the heat flux coming from the block at that partitioned face. Is that method ok? Cause its not really working?

Thanks!