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Parameter sweep and solution steps help
Posted May 7, 2014, 2:06 a.m. EDT Version 4.3 2 Replies
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Hello,
I am new to Comsol and I am having some trouble using the parameter sweep.
I am modeling a floquet boundary condition in eigenfrequency analysis for a solid mechanics model. I need to set few parameters sweeps for two variable simultaneously. For example, the two parameters are kx and ky. Let's say the first sweep is kx= [0 to1/2] and ky=[1/2 to 2/3], and the second sweep is kx = [1/2 to 3/4] and ky=[2/3 to 1].
I run the first sweep and get a solution. Then I create a new node and specify my range for the second sweep. However, whenever I get a solution it seems to erase the old one. All I need to do is just run the problem for these new values while keeping the old solutions.
I am not sure if the extension drop down really helps since there is no a continuation option. From the physics of the problem the "continuation" does not really matter because this doesn't depend on the solution before.
So in the nutshell how can I run multiple parameter sweeps while keeping the previous results from a previous sweep.
I am new to Comsol and I am having some trouble using the parameter sweep.
I am modeling a floquet boundary condition in eigenfrequency analysis for a solid mechanics model. I need to set few parameters sweeps for two variable simultaneously. For example, the two parameters are kx and ky. Let's say the first sweep is kx= [0 to1/2] and ky=[1/2 to 2/3], and the second sweep is kx = [1/2 to 3/4] and ky=[2/3 to 1].
I run the first sweep and get a solution. Then I create a new node and specify my range for the second sweep. However, whenever I get a solution it seems to erase the old one. All I need to do is just run the problem for these new values while keeping the old solutions.
I am not sure if the extension drop down really helps since there is no a continuation option. From the physics of the problem the "continuation" does not really matter because this doesn't depend on the solution before.
So in the nutshell how can I run multiple parameter sweeps while keeping the previous results from a previous sweep.
2 Replies Last Post May 7, 2014, 2:20 p.m. EDT
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Posted:
1 decade ago
Look at documentation of "Specified combinations".
"If more than one parameter name have been specified the lists of parameter values are interpreted as follows: Assume that the parameter names are p1 and p2, and that p1 has the list 1 3 and p2 has the list 2 4. For the Specified combinations sweep type, the solver first uses p1 equal to 1 and p2 equal to 2. Thereafter, it uses p1 equal to 3 and p2 equal to 4. And when the sweep type in All combinations, the solver uses the following order for the parameter combinations: 1 2, 1 4, 3 2, and 3 4.
"If more than one parameter name have been specified the lists of parameter values are interpreted as follows: Assume that the parameter names are p1 and p2, and that p1 has the list 1 3 and p2 has the list 2 4. For the Specified combinations sweep type, the solver first uses p1 equal to 1 and p2 equal to 2. Thereafter, it uses p1 equal to 3 and p2 equal to 4. And when the sweep type in All combinations, the solver uses the following order for the parameter combinations: 1 2, 1 4, 3 2, and 3 4.
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Posted:
1 decade ago
Thanks for the response this actually helps me more with what I want to do, but my main problem is.
I want to set two parameter sweep nodes.
first node for kx =[a to b] and ky = [c to d]
then I run the solver.
after that I want to run another sweep where:
kx = [e to f] and ky = [g to h]
I am able to run the first sweep. Then I right click the study node and create a second parameter sweep. However, when I calculate compute. the old results are deleted, I want to keep them.
In general,
1) I cannot run more than one study without deleting the old solution. How can I keep the results from the previous.
2) how can I run the two separate parameter sweeps node above without deleting the first one.
I want to set two parameter sweep nodes.
first node for kx =[a to b] and ky = [c to d]
then I run the solver.
after that I want to run another sweep where:
kx = [e to f] and ky = [g to h]
I am able to run the first sweep. Then I right click the study node and create a second parameter sweep. However, when I calculate compute. the old results are deleted, I want to keep them.
In general,
1) I cannot run more than one study without deleting the old solution. How can I keep the results from the previous.
2) how can I run the two separate parameter sweeps node above without deleting the first one.