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Any clever tricks to smooth intermediate results?
Posted Aug 11, 2010, 11:20 a.m. EDT 1 Reply
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Hi, I know that COMSOL doesn't really like to integrate, but loves to solve differential equations. So if you want to compute averages, etc, sometimes the simplest is to cast into an ODE and solve that.
My problem at hand relates to heat-transfer-coefficient. I can compute it, no problem, but it is "noisy", so I'd like to apply a smoothing condition to it before using it in the rest of the problem so that the noise doesn't keep propagating into rest of the computations.
Something like:
new_h(x) = 1/(2D) integral (x-D)^(x+D) h(x) dx
for some suitable D, or maybe a convolution with a bump function instead of a step.
Can you think of how to get that result from COMSOL? {This needs to be done inside the solving module, not as a post-processing step}.
Thanks, John
My problem at hand relates to heat-transfer-coefficient. I can compute it, no problem, but it is "noisy", so I'd like to apply a smoothing condition to it before using it in the rest of the problem so that the noise doesn't keep propagating into rest of the computations.
Something like:
new_h(x) = 1/(2D) integral (x-D)^(x+D) h(x) dx
for some suitable D, or maybe a convolution with a bump function instead of a step.
Can you think of how to get that result from COMSOL? {This needs to be done inside the solving module, not as a post-processing step}.
Thanks, John
1 Reply Last Post Aug 13, 2010, 11:55 a.m. EDT
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Posted:
1 decade ago
Hi, I know that COMSOL doesn't really like to integrate, but loves to solve differential equations. So if you want to compute averages, etc, sometimes the simplest is to cast into an ODE and solve that.
Hi John,
To bump the topic up and learn a bit more, can you elaborate on how you manage to do this? It sounds quite interesting.
Best,
Danial