Unknown heat source in heat transfer-laminar flow coupled model
Hi all, I am modeling a volcanic conduit (5 m wide) moving up through a "host rock." I want to analyze the thermal budget of this situation. The conduit is a rectangle (Heat Transfer in Fluids, Laminar...
View Articleconservation condition for rate equations (PDE)
I'm trying to model a structure with the RF module (time dependent) coupled with a system of differential equations that describes the rate equations of atoms populations in different energy levels...
View Articleline graph of surface integral
Hi My model is a cylinder (3D) axis is in z direction. I can get a surface integral of a variable (eg volume force) in any xy plane. I now wish to display on a line graph, the variation of this xy...
View ArticleScttering problem using comsol4.2
I wanted to calculate scattering absorption cross section and thereby extinction for a nanoparticle. I am not sure how to go for that in comsol4.2. Can anyone please tell a basic flow to accomplish...
View ArticleAC Electrical Field simulation in interdigit structure
hi I want to do AC filed simulation for interdigit structure. I am wondering what kind of physics should I select and how I can apply AC signal to my structure? I would appreciate any help
View ArticleRod buckling
Hi, colleagues I'm a new user of comsol and I need to solve a easy task at first: buckling of a rod under pressure. What kind of solver should I use to get both amplitude and wavelength of undulation?...
View ArticleProblem with wall layer
Hello Comsol Community, I'm new to Comsol and modeled a U-shaped pipe in a concrete block. Cold water (1°C) flows through the pipe and the warmer concrete (11°C) surrounding it warms up the water...
View ArticleEvaluation of Volumteric displacement
Hi all, I am modelling a diaphragm deformed under pressure loading in an axisymetric model. I was wondeing if there is a way to evaluate volumetric displacemnt of the diaphrgam due to displacement....
View Articlespecifying materials in Matlab
Hello, I am trying to setup a simple Matlab script to calculate modes of a step-index optical fibre (there is a tutorial model which describes in much detail how to do that in Comsol, but no mention of...
View ArticleSaving error
I cannot save my model. Is it possible because of the many data points I have? If so, then what other option do I have?
View ArticleGenerate and plot 3D solution, given 2D solution
Hi all, I'm using weak-form modeling to solve for a vector field u(x,y,z). The vector field has 3 scalar components u1, u2 and u3. I know the functional form of the solution in the z-direction; it is...
View ArticleParametric sweep
I have a range of angles set as parametric sweep ie range(0[deg],0.1[deg],4[deg]) And also I have a study in frequencies with range(2[THz],0.1[THz],5[THz]) When it solves it puts them all together in...
View Article2 stationary studies within one study
I am interested in solving two stationary problems on the same geometry within one study. The only difference between the two problems is that the flux boundary condition is applied to different...
View ArticleLinking a Porous Media Flow to a Transport of Concentrated Species
Hello, I have created a chamber that has sugar water running through a compartment and carbon cloth modeled by a free and porous media flow physics. I also want to create a transport of a concentrated...
View ArticleTemperature change from expansion of air
I am trying to model the flow fields of a fluid (air) traveling through an orifice. I have a working model that works great using only the laminar flow module. However, the viscosity of the fluid is...
View ArticleContinuous microwave oven with a conveyor belt system
Good afternoon, I simulated a continuous microwave oven with a conveyor belt system in COMSOL version 4.1. For this propose, I used the moving mesh algorithm. I tried to do the same in 4.3a version and...
View Articlecomsol default solver parameters
Hello all, I am generating a matlab-script based comsol model and want to be able to run it from within Matlab. I am simulating a time-dependent study of a vibration problem. From my understanding of...
View ArticleDoes Far-Field Calculation with 2-D Fluoquet Boundary Condition make any sense?
Dear Community members, I was using Background and Scattered Field method simulating an infinite 2-dimensonal array, and the result matches almost perfectly with our experimental results. We wanted to...
View ArticleFSI Modelling Capabilities?
Hi all! I am modelling a tube which acts as hyperelastic material. Inside the tube there is a fluid. Third object suppose to push this tube in one direction. Tubes edges are constrained. The problem is...
View ArticleMesh element volume
Dear all, I have a material property having a different value in a domain and it is function of individual volume of deformed mesh element and undeformed mesh element. Could you tell me how to get the...
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