Heat transfer
Can anyone tell me what is the recomeded NLfail value in simulation Comsol solver. Thank you inadvance for your help!
View Articleusing the Amazon cloud
I was interested in hearing any opinions regarding the use of COMSOL in the Amazon cloud. We currently have limited computing resources in house and so we'll either purchase a new machine or switch...
View Articleresults depend on parameter sweep order?
Hi all, Is it possible that in some cases the results of a structural mechanics simulation depends on the order in which a parametric sweep is done? I am simulating the deformation of an object when it...
View ArticleRamp fuction or?
Hi, I am simulating heat transfer with fluid flow, thus I need to slowly increase my heat source to make my simulation works. Until now I've been using step function but I feel liek ramp function fits...
View Articlenew to cluster computing, need help
Hi Elham, My name is Ehsan a PhD student at University of Waterloo. I am trying to learn cluster computing with COMSOL and unfortunately nobody has done it here! We have the right licence and we do...
View ArticleWeak Form PDE: how to impose Neumann BCs?
Hi everyone, I'm new in Comsol, so I apologise in advance if my question is trivial. I'm exploring Comsol capabilities in solving PDEs, and my current unidimensional equation is the follow: A(u) u'' =...
View ArticleIce Slurry flow in pipe
Dear Nagi Elabbasi I am currently trying to build a model for ice slurry flow in a pipe using mixture model laminar flow, with my interest in velocity, dispersed phase fraction distribution. i...
View ArticleFinding the best step size
Hi! I've been trying to simulate flow past a (hot) cylinder. I simulate Re-Numbers up to 190. After running the simulation for various step sizes (0.5/1/10/20/50/100 s) I tried to visualize the...
View ArticleJoining Edges (results)
Hello All, I have a situation where I have a parametric sweep, and I get a couple of solutions (all having the same geometry). I can use the join operator to subtract the solutions and I get something...
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 Articlethe free vibration of the cantilever
Hi everyone: The initial displacement D=1.05mm, is placed on the end of the cantilever beam, to solve the velocity response of the beam end. First, I select space dimension 2D, and add physics Beam,...
View ArticleConvergence problems simulating a thin film - structural mechanics coupling
Hey everybody! My goal is to simulate the stresses during a load cycle in a bearing shell. The problem: I assembled a journal bearing in con-rod from which i cut off the major part so that the...
View ArticleHeat Transfer
Hello I'm a student on the project, and I'm messing in COMSOL 4.0 a short time and have no notion of "heat transfer", I need to get the temperature to stabilize so you can compare with the real model!...
View ArticleCyclic Voltammetry (CV)
1) I am using the electroanalysis physics module with the built-in CV study only. How does one define the two electrodes which the CV is being applied, in the case of a two-electrode setup? 2) Is there...
View Articleinitial Values of Variables Solved For
Hi, I have someting to know. As you know, the initial condition set is as follows: initial Values of Variables Solved For Method: initial expression, Solution Solution: Zero, Solver1, Solver2 in...
View ArticleConvergence problem in a simple geometry with Joule heating module
Hi guys, I am modeling a simple geometry (some stacked layers) with um and nm dimensions in comsol 4.3b. The convergence plot goes down rapidly at first and after some iterations it seems that the...
View ArticleMhd model of a crucible furnace
Dear collegues, i´m setting the procedure to evaluate the movement of the molten metal in a simple crucible furnace: reading the papers from comsol (...
View ArticleWeak form for 2-D elasticity
In an effort to learn COMSOL, I decided to model the two-dimensional elasticity equations using the weak form. I was surprised looking through the documentation that there are very few example...
View ArticleSuccessive simulation in COMSOL 4.3
Hello everybody! I am curently doing simulations of fluid flows in microfluidic channels. The total simulation domain is quite big and a mesh that could provide a solution with resonable precision...
View ArticleOptimization problem
Hi everybody! Please give a hand. Knowing the experimental value of the function (for example, the maximum temperature of the body at a specific point), I need to find the optimal value of parameter...
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