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Importing data and parameterizing
Posted Jul 24, 2017, 9:45 a.m. EDT 2 Replies
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Hi!
Recently I'm trying to use comsol for evaluating a value which is related to two different physical quantities. For one of them I've made enough simulation data set in comsol, and for the other I've got a data set which is in txt format (or csv) from my friend. Now I am trying to evaluate volume integral in comsol, where the integrant is a combination of two quantities. The problem is that the parameters in the expression of integrant in comsol volume integral must be in the comsol data set, but one of the data set which I've got from my friend is just a txt format data so that I can only import it in a table.
For example, in a specific geometry and boundary conditions, let's say I've got E field data from comsol, and B field data as a txt file from somewhere. I want to evaluate a volume integral of combination of two, such as [ integral(E (outerproduct) B) dV ] , but I cannot figure out how to properly import B field data from txt file and combine it with E field from comsol data set.
I can curve fit the txt data so I can make another data set with different positions.
Any idea or experience about this kind of situation?
Thank you very much!
Recently I'm trying to use comsol for evaluating a value which is related to two different physical quantities. For one of them I've made enough simulation data set in comsol, and for the other I've got a data set which is in txt format (or csv) from my friend. Now I am trying to evaluate volume integral in comsol, where the integrant is a combination of two quantities. The problem is that the parameters in the expression of integrant in comsol volume integral must be in the comsol data set, but one of the data set which I've got from my friend is just a txt format data so that I can only import it in a table.
For example, in a specific geometry and boundary conditions, let's say I've got E field data from comsol, and B field data as a txt file from somewhere. I want to evaluate a volume integral of combination of two, such as [ integral(E (outerproduct) B) dV ] , but I cannot figure out how to properly import B field data from txt file and combine it with E field from comsol data set.
I can curve fit the txt data so I can make another data set with different positions.
Any idea or experience about this kind of situation?
Thank you very much!
2 Replies Last Post Oct 18, 2017, 3:09 a.m. EDT
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Posted:
7 years ago
Updated:
7 years ago
Hello Saebyeok,
You can import this external data into your COMSOL file using an interpolation function (Definitions > Functions > Interpolation). After you update the solution, you will be able to use that interpolation function in all the usual post-processing tools.
Since it's a vector field you want to import, you'll need to define one interpolation function per component, so 3 in 3D.
Best,
Jeff
You can import this external data into your COMSOL file using an interpolation function (Definitions > Functions > Interpolation). After you update the solution, you will be able to use that interpolation function in all the usual post-processing tools.
Since it's a vector field you want to import, you'll need to define one interpolation function per component, so 3 in 3D.
Best,
Jeff
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Posted:
7 years ago
@Jeff Hiller Thank you so much!!