Convergence in two-way coupled mass transfer
Dear all, I am trying to solve the concentration profile in a multiscale non-steady state two-way couple mass transfer problem (specifically, an extractor). This is as follows: Concentration at the bed...
View Articleperistaltic pump model convergence
Hello, I am working on a model that is similar to the peristaltic pump model available in the “model gallery”. I would like to use this example to present my problem. The peristaltic pump model does...
View ArticleConvergence plots
Does anyone know if it is possible to show a convergence plot during a livelink with Matlab? I'm using version 4.4 and matlab R2013a. Thanks
View Article"Conjugate Heat transfer" failed to converge if a fluid is included.
A cylinder with a cavity filled with water is the geometry. At the beginning, the outer wall hast a temperature different from the contents."Conjugate Heat transfer" is used to model the thermal...
View ArticleHow can I manage individual cell values of a mesh in a convergence process?
Using module Semiconductors for computing Electric Potential for a certain geometry, sometimes during convergence process one can observe how few cells close to both exterior limits of a domain and...
View ArticleSilicon waveguide convergence value?
Hello. I am studying silicon waveguide using RF module in COMSOL 4.2a version. My questions are what is the convergence in COMSOL multiphysics? is it fine that I got the convergence value which is...
View ArticleDeformed geometry model converges until I try to use the lagrange multiplier
Hi all, I'm trying to model the growth of a cavity in a block of ice in response to a flow of hot air. I have a model that works fairly well, with conjugate heat transfer and a deformed geometry to...
View ArticleModel convergence dependent on mesh quality, confused!
Hi all, My COMSOL model only solves when the mesh size is "above" the predefined Normal size. When I increase the mesh resolution to "Fine" or higher, the step BiCGStab in the progress tab stalls at...
View ArticleDifferent convergence requirement (relative tolerance) for different...
I am working on a time-dependent model that couples two different physics branches. If I disable the second branch in the time-dependent solver, I can get a solution to converge with a relative...
View ArticleGeometry Units and Convergecne
Hello, Does anyone know why changing the "geometry unit" raises convergence issues? For instance, when I change mm to cm, while all other parameters are the same, simulation diverges! Thank you in...
View ArticlePeriodic Stimulation of Electric Currents Interface
Hello, I am trying to simulate an electrode with a periodic biphasic square pulse through a periodic piecewise function to stimulate it. The piecewise goes between 1, -1 and 0 and I multiply it by my...
View Articlecfd simulation
Hello everybody! I would like to know what is the residual and tolerance factors, in the tab solver/fully coupled. How can we change them in order for the solution to converge? Thanks in advance.
View ArticleHelix (nonlinear magnetic) under Homogeneous Magnetic Field (Convergence...
Dear Sir, I saw that you've been answering a lot of these questions in the COMSOL forums, and was wondering if you could solve me the following problem, since I've been fighting with it for days with...
View ArticleSolution is not converging for solar cell problem.
Hello everyone, I'm trying to simulate a solar cell with four layers, and I got success with the one dimensional problem. But when I tried the same in two dimensions, the solution is not converging....
View Articleconvergence speed
Hello, In some previous FEA software I looked at, there was an option to limit the degrees of freedom to speed up solution times. In a 3D model for example, one could only look at movement along the y...
View ArticleConvergence: when should I stop the model?
Hi everyone I have been working on models that take several days to solve. One of them is running at the moment, and I just have a general question. When I look at the Convergence Plot 2, which is...
View ArticleWhat is convergence?
I'd just like to know what convergence is - in the context of COMSOL.
View ArticleConvergence plots
Does anyone know if it is possible to show a convergence plot during a livelink with Matlab? I'm using version 4.4 and matlab R2013a. Thanks
View Article"Conjugate Heat transfer" failed to converge if a fluid is included.
A cylinder with a cavity filled with water is the geometry. At the beginning, the outer wall hast a temperature different from the contents."Conjugate Heat transfer" is used to model the thermal...
View ArticleSolution is not converging for solar cell problem.
Hello everyone, I'm trying to simulate a solar cell with four layers, and I got success with the one dimensional problem. But when I tried the same in two dimensions, the solution is not converging....
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