Revisit: k = (0.1+10*(T>25)) Instead of using a “jump” in k, use a smoothing function Now try: k = 0.1+DK*flc2hs(T-25,STEP) Try: DK, STEP = 0 8 2.5 4 5 2 7.5 0.5 10 0.25Īchieving convergence for non-linear problems DONEĪssuming that the problem is well-posed, try solving itġ) Check the initial condition Not converging? Converging?Ģ) Use parametric solver to ramp load Not converging? Linear system of equations is solved using the specified solver Solver settings – more information …Solver Sequence 1 > Stationary 1 > Fully Coupled 1
We can also explicitly choose linear or nonlinear. 
COMSOL can inspect the stiffness matrix and decide whether the problem is linear or nonlinear. Stationary solver settings …Solver Sequence 1 > Stationary 1 Information on variables being solved and their initial valuesĭetailed information on solver settings such as choice of solver, tolerance, etc. To look at the Solver Configurations before solving, right -click on Solver Configurations and select Show Default Solver You can add multiple study steps by right -clicking on the Study nodeĬOMSOL automatically uses the solution of the first study step as the initial value for the second study stepĬontains all the solver settings and sequences Comsol free download for students how to#
Study defines how to solve a model – Study Steps – Solver Configurations – Job Configurations. One Study Type (Frequency Domain Model) = Two Study Steps (Eigenfrequency & Frequence Domain Modal) Study Type: Bundle of Several Study Steps Here: using Compute instead would generate a new default Solver Sequence to avoid overwriting your changesĬomputing a Solution: Sequence Level Use this Solver SequenceĬomputing a solution Use the nodes up to and including this node (here Variables). No computations.Ĭomputing a Solution: When Editing Low-Level Settings Compute Using Attached Sequence Compute Using Attached Sequ ence will useĪ Solver Sequence that you have manually edited. 
Only generate a Solver Sequence corresponding to the Study Steps.
Solver tolerances are set hereĬomputing a Solution Automatically generate a Solver Sequence corresponding to the Study steps and compute the solution. Corresponds roughly to Old Solver Manager Init PageĬorresponds to Solver Parameters of 3.5a.Note: May point to Study Step of different Study: Study 2, Study 3 etc. the continuation solver for a Stationary or the time span for a Time Dependent)Ĭontrols the sequence of: Some fundamental settings for the study type (e.g.Which Physics Interfaces to solve for.
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