Hi, I am facing a problem with the initial conditions in the heat equation. Basically, when I set the initial condition to be u0(x) = 0 everywhere, the simulation goes wrong and I get weird results, just like if the equation was ignoring the source term and the solution remained 0 everywhere. impor…

Start by checking the scaling of your plots in paraview, what is the range? As your initial condition is 0, paraview probably chooses the 0 to 0 range, Which you have to rescale

I’m not sure what solution you are expecting. This is what I get after one time step: [image] 12 time steps: [image] 75 time steps: [image]

Your output is exactly what I expect to obtain. Nevertheless, I get something like this in the first step: [Captura desde 2023-05-29 17-29-19] And I don’t have any idea of what is happening… Taking that it worked out correctly for you, I assume that there must be something wrong with my instalat…

Oh God it was the hecking plot range… I can’t belive I’ve been stuck thinking that the simulation was wrong… Thank you very much, very helpful as always. PS sometimes I hate computers haha

Zero initial conditions

General

dokken May 29, 2023, 12:36pm 2

I’m not sure what solution you are expecting.
This is what I get after one time step:

12 time steps:

75 time steps:

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Zero initial conditions

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