Questions tagged [stiffness]
The stiffness tag has no usage guidance.
8
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3
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NDSolve producing oscillatory results
NDSolve producing very oscillatory solutions even after not having any large numbers or warning/errors
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- 55
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45
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NDSolve returns stiff problem and forces extrapolation which gives unreasonable result
I am trying to solve a first order ODE using ParametricNDSolve for getting particle trajectory in a flow around an obstacle. I got an error message that "At t == 221.96028149270003`, step size is ...
- 1
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64
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Stiffness or singularity in NDSolve for a system of equations with switchpoint
I am trying to solve the following set of equations:
...
- 73
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48
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Stiffness problem which abruptly stops the evaluation
We have a Lagrangian and we found the EOM. We need to solve the EOM and find the Phase-space plot. However, we are facing a stiffness problem which abruptly stops the evaluation (...
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NDSolve stiff system of ODEs
I am having a hard time trying to solve the following system of ODEs
X'' = e^{2X} + e^{2Y}
Y'' = e^{2Y} - 3 e^{2X}
with initial conditions that mimic a linear ...
- 13
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52
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Explicit modified midpoint (Gragg smoothing)
In the "StifnessSwitching" method the default numerical scheme for the non-stiff solver is Explicit modified midpoint (Gragg smoothing) with a decreasing step size.
I decided to study the ...
- 13
4
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1
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113
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FEM breaks because of Abs(f'(x))
I am trying to solve a 1d differential equation in Mathematica using the finite element method. I have successfully implemented the problem in a commercial software called COMSOL, but I like to use ...
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Can NDSolve be initialized with a close solution?
I have a set of 4 first order ODE with 4 initial conditions to be met. It models a simple damped pendulum like the one described here. What changes is the damping term and I switched to first order ...
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