New answers tagged finite-element-method
2
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Post Processing of Solution and Plot of Coupled Partial Differential Equation Over a Semi-Circular Domain
I can't get the same exact plot for the second part. This is what I get
This is the code. Feel free to change it as needed.
...
- 135k
3
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Solution and Plot of Coupled Partial Differential Equation Over a Semi-Circular Domain.II
Since you used NDSolveValue to solve the first PDE, then you can use that solution in the second PDE using sol1[r,θ] and not as ...
- 135k
2
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Accepted
NDSolveValue result contradicts initial condition
Let's have a look at the mesh that is automatically generated:
Needs["NDSolve`FEM`"]
mesh = ToElementMesh[rg]
Now, we evaluate the ic at the coordinates ...
- 39.1k
2
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1
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Accepted
FEM solution for onedimensional boundary value problem doesn't evaluate
That's a typo: You used
"MaxCellMeasure->0.1"
but you should use:
"MaxCellMeasure" -> 0.1
- 39.1k
1
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Mathematica thinks that an initial condition is a boundary condition
Here is a way to solve it. Note that there is no need for the NeumannValue, as the 0 NeumannValue is the default. I have changed the initial condition on R and gave ...
- 39.1k
3
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Artifacts when interpolating on an unstructured set of 3D data
How about something like this:
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- 39.1k
1
vote
Accepted
1
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Accepted
Need help solving cylindrical Laplacian
You'd need to use Cartesian coordinated (or use a RegionSymmetry). Something like this should get you started:
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- 39.1k
2
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Solving Schrödinger equation for Dirac comb potential (kicked rotor)
One problem with your approach is that DiscreteDelta is designed to accept exact integers. A numerical equation solver works with real numbers, and the sampling won't select an exact integer, so ...
- 621
1
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AceGen: Assemble a user specific global array (similar to "Residual")
Tasks subroutines can only be used to assemble vectors and square matrices. Your L matrix can be assembled by calling Tasks 6 times, for each column separately.
About the syntax error. It is an AceGen ...
- 826
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