Optimization program for the fluidic system using COMSOL livelink for the MATLAB
I'm making the optimization program for the fluidic system. I use comsol 4.4 livelink for MATLAB. but I don't know how to enter the Navier-stokes equation with weak form into m-file. So, I wanna get some help. Please give me example m-file or MATLAB expressions.
Hi,
perhaps you can also use Comsol Optimization directly for such purposes.
Greetings..
Create your model using the COMSOL GUI and save it as a MATLAB M-file. Then you can modify the M-file making it a function that you can optimize.
Dear Hyen-Guk Kim, it is, indeed, the easiest to create the model using the GUI, then "Save As" the m-file and see for yourself how it works inside. Always remember to do "File -> Compact history" before saving your model as the m-file because otherwise, every change/enable/disable event is recorded and included in the m-file, making it very confusing.
You will see that the resulting m-file is a function file which runs a sequence of commands and returns a variable called "model" which is an object containing all the information about your model. However, if you want to feed your model to some optimization algorithm, you will probably need to modify this function so that it returns some concrete numerical values that you want to optimize, e.g. velocity, pressure at some coordinates, etc.. To extract actual numerical values from the "model" objecct, you will use the mpheval() function which is now luckily quite well documented in COMSOL's manual.
That's all I can think of based on your description of the problem. Good luck with with your efforts!
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