# Analysis for bake-out of a structure

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 July 8, 2009, 05:16 Analysis for bake-out of a structure #1 New Member   Anna Encheva Join Date: Jul 2009 Posts: 5 Rep Power: 10 Hello, I have to prepare a model - about 40 tons in reality with many cooling channel for bake- out analysis, which means - the structure should be heated from room temperature to a temperature of 240 deg.C. by using a fluid, either water or gas. The result should be which is the shortest time to which you can bring the structure to 240 deg.C and by which flow rate, pressure, etc. I have to play around with different fluids, different pressures , maximum allowable is 40 bar, and different mass flow rates. In this case which should be the most robust initial conditions I have to apply and how can I get from the results the pressure drop as well - the cooling channels in the whole structure are with many curvatures, bendings, etc. Thank you for the advices

 July 8, 2009, 07:38 #2 Super Moderator   Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 13,993 Rep Power: 107 The documentation discusses robust boundary condition combinations. Have a read. It is trivial to get the pressure drop in CFD-Post, just calculate the areaAve pressure (or total pressure usually) over the inlet and outlet boundaries. Glenn Horrocks

 July 8, 2009, 18:32 #3 Senior Member     George Join Date: Mar 2009 Location: Birmingham, UK Posts: 257 Rep Power: 11 if you're on about optimising a design or a procedure then yes cfd is what you should be doing. however to be honest i think you itend to use the wrong software for the job.. from the description of your problem i think you'd be better off on doing "what if" analysis with 1D fluid/thermal software like flowmaster or you could investigate the posibility to use modelica (open source) __________________ Top 4 tips 1. Knowledge is everything and Ignorance is dangerous. 2. Understand your limitations and try to eliminate them. 3. Get yerself a bike and hoon the chuffer. You will soon learn why dogs like to hang their heads out the car window. 4. Please before asking any questions on how to run simulations in CFX, go though all the tutorials

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