problem in boilling of water... need help
I'm not able to run this simulation. If anyone can help me to run this simulation, it would be a great help.!! Thanks in advance. -- Surjendu Maity IIT-G INDIA
View ArticleEvaluating force in comsol
I have an L-joint between two pipes. I want to evaluate the force the fluid flowin in it exerts on inner wall of the joint. So I think I have to evaluate the F term in N-S equation as written in Comsol...
View ArticleProblem in finding reflection characteristics of silicon solar panel
I'm new Comsol, How to create a silicon solar panel (i'm using wave optics module for the creation ) . I need to apply Laser and short pulse on the substrate and find its reflection character. how to...
View ArticleVelocity reinitialization in particle tracing module
Hi everyone, I am trying to model a 2D particle particle collision using velocity reinitialization. What I want is, the velocity should reinitialization into a set of specified x and y velocity...
View ArticleQUESTION
Dear all, If I have a parameter defined as 'Para' used in an Auxiliary sweep (stationary study) as followis:- Para=[0,0.1,1] This is used to introduce body load of as: -80 [kN]*Paara When study is...
View ArticleConvergence problem in Joule Heating
Hi, I am trying to perform a stationary simulation about Joule Heating using the Electric currents and the Heat Transfer modules. I am using also a material with a specific Electrical conductivity -...
View ArticleExport eigenvalue problem
Hi everyone! I'm having a quite strange problem and I'd apreciate your expertise. I'm looking for the transversal modes (with the mode analysis study) in a step index fibre using the wave equation...
View ArticleHeaviside function Comsol
Hi, I am solving the heat transfer function, with an initial condition,. In my simulation the initial variable is called Ninit, and I want to define it with a heaviside function, Ninit =...
View ArticleCOMSOL Multiphysics performance on 4p Opteron system
Hi, I have some performance issue with COMSOL Multiphysics on a new system. I apologize in advance but it will take long. Recently, we have built a new rig in our institute: Supermicro H8QGI-FN4L...
View ArticleLivelink Matlab. Running processed data back to comsol
Hello Comsol community, Is there an straight forward way to send modified meshed data back to comsol after processing it with Matlab? Let me explain. I am reading a certain variable from a domain, from...
View ArticleHelp on temperature control with pde
Hi all, I am working on a problem, in which hot fluid is flowing as a thin film and being cooled. I use two coupling PDEs to solve the film thickness and the temperature∂H/∂t= ∇.F(H) H...
View Articlefailed to find consistent intial values
I am trying to model the biochemical interactions between an inflammatory cytokine and biomolecules present in cartilage tissue. The cartilage tissue in the model is represented by a rectangular domain...
View ArticleTwo Stream Simulation
Hey, everyone. I've been using COMSOL for about 2 weeks now and needed mostly to teach myself how to use it *for summer research*. I'm having trouble running this simulation that's attached. The...
View ArticleGoal seek function?
Hello, and thank you (anyone!) who has any pointers for this problem I'm running into. I'm new to Comsol and doing some diffusion modeling. I have a point plot with time on the x-axis and concentration...
View Article(HELP!!!) Integration coupling variables problem
integration coupling variables->boundary variables problem I am simulating a fluid flow using Poisson's equation in a 2d environment(2d square). Fluid is taken as it is entering from the top...
View ArticleHow to deal with the flow field and get the pressure drop in...
Hi, Everyone. Attached is a simple magnetorheological fluid valve model (Comsol 3.5a) with an uniform magnetic field (already obtained), but the errors occured as follows when the flow field was...
View ArticlePlotting unit length as a function of the angle of incidence
I am having trouble with presenting a polar plot for the RCS per unit length as a function of the angle of incidence for 3D model. If the expression for plotting the said RCS for the 2D model would be:...
View ArticleThermal simulations: watt per second.
Hello, I have modelled an IC and I would like to set a block in my model (the IC) that produces a heat wave that is spread through the other components: PCB, solderballs, etc. I am using the 'Heat...
View ArticleParametric Sweep over parameter dependent range
Hello All, I am new to COMSOL and need some help. I believe this is a simple issue but I can not seem to fix it. I am trying to do a parametric sweep over two variables X and Y. I am seeing X to be...
View ArticleReg. dest function in particle tracing module
HI everyone, This is a very simple question, but since I am a beginner, I couldn't figure it. Q: dest() function accesses the property of the neighboring particle. I know how dest(qx) works. But what...
View Article