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Solutions - Solver
- 1030: Error message: "Out of memory"
- 1029: My transient 3.3 model does not work in version 3.4
I have a transient model that worked fine in COMSOL 3.3a but when I open it in version 3.4 and run it I get the error message Error: Time 0: Failed to find consistent initial values. Last time step is not converged.
- 1025: Level Set method for two-phase flow, how does it compare with the Volume of Fluid (VOF) method?
I am new to COMSOL Multiphysics and have seen that you can use the Level Set method to track phase boundaries, for example in a rising bubble. I have heard of the Volume of Fluid method (VOF) before. What is the...
- 1010: Error 7067, System matrix is zero
I get the error message "Error 7067, System matrix is zero". What can it be?
- 1001: Running COMSOL in parallel mode
This solution describes how you enable parallel use of the processors on a multicore or multiprocessor computer.
- 984: How to do a parametric study for a time dependent or an eigenvalue problem
I want to solve a time dependent or an eigenvalue problem for many different values of a parameter. Can this be done automatically?
- 964: Error message: Failed to find a solution: No convergence...
I get this message: Failed to find a solution: No convergence, even when using the minimum damping factor. Returned solution has not converged.
- 962: Which element types are supported in COMSOL Multiphysics?
- 952: Negative concentrations
Why do I get negative values of the concentration?
- 935: Interpolation of measured data
I have data tables for my dependent material properties. For instance, I have values of the thermal conductivity at some different temperatures, and I have a map of permittivities versus coordinates. How can I get...
- 921: Time-step control
How does COMSOL Multiphysics determine the time-step size?
- 905: Smoothed step transitions in COMSOL Multiphysics
- 877: What are the relative and absolute tolerance for a time dependent problem?
What are the relative and absolute tolerances (Rtol and Atol) for a time dependent problem? How do I know which values to give them? In the manual it says that the absolute tolerance can be a list of degree of freedom...
- 875: What is meant by degrees of freedom (DOFs) in COMSOL Multiphysics?
What is meant by degrees of freedom (DOFs) in COMSOL Multiphysics?
- 830: Handling memory intensive models
Handling memory intensive models
- 103: Convergence problems at high reaction rates (large source terms)