How to set the polarization direction of the piezoelectric material
Hi everyone! I am doing a simulation about piezoelectric materials. My confusion is that if I create a piezoelectric material, the properties of this piezoelectric material change when I change its...
View ArticleHow to set continuity boundary conditions
Hi everyone!I am simulating a piezoelectric model .I don't know how to set continuity boundary conditions between two materials in the model.Best wishes Liu Hao!
View ArticleChannel
I want to make a channel which has an atomic size through which I can add some physics.If anyone have some idea regarding this plz suggest me.thank you
View ArticleTime-Dependent resonance frequency study, thermal stress study of a...
Hello,I am interested in determining the effect of a time-dependent thermal distribution on the resonance frequency of a nanostring.My geometry is a nanostring (thus, ill-conditioned) with an initial...
View ArticleStudy of tunnel fixed at both ends
Hello all,We are trying to solve FSI of a Submerged Floating Tunnel which is fixed at both ends. When i'm modelling with fixed at the Walls of the fluid domain, its not able to slove that. It always...
View ArticleFluid Flow Pressure Drop In 2D or 3D?
Hello All,I'm quite new to COMSOL and am trying to clarify something. I am running a turbulent flow model in 2D of an open object and want to know if I can extract the pressure drop from the post...
View ArticlePhase change and Fluid flow.
Hi im trying to simulate a process in wich Ethylene Glycol is heated beyond the boiling point (inducing phase change). I need to evaluate the phase change, and the fluid flow due to the change in...
View ArticleArc discharge
Hello All, I am trying to simulate arc discharge. I am sung Ar plasma chemestery. As a cimple geometry i am simulatind only two bowl as a cathod and anode in the axisymetric model. I followed the...
View ArticleDifference between measured perimeter and calculated perimeter
Hi allI am trying to cauculate the perimeter of the geometery in my model.Firstly, I used the measure function to acquire the perimeter.Secondly, I defined a interpolation function intop(1) on the...
View ArticleHow to define coaxial lumped Ports when simulating the quarter of a geometry
Hi all,I am simulating a TEM (Transverse electromagnetic) cell. The geometry have two PMC (Perfect Magnetic Conductor) symmetry planes, so I simulate only the quarter of the geometry. The two planes of...
View ArticleFlat Plate Membrane Reactor
Hi Guys,I was wondering if I might be able to get some help with current error I am receiving for the initalization of variables. I'm pretty new to comsol and according to google this might be a node...
View ArticleConvergence problem
Hi!I try to simulate a gold nanorod on glass using RF Module (see the attachment). Either I have problem with meshing or the geometry has some singularities. Actually I have been struggling with this...
View ArticleQuestion about Derivative Expression
I have a problem about derivative expression... I use T as a variable in the Partial Differential Equations model, when I check my results, I find that Tx≠0, while d(T,x)=0. Why this happen? And if I...
View ArticleThermoelectric generator
Good morning everyone,I have some difficulties to calculate the output power of a TEG generator in COMSOL. Simply, until now, I have modelised the TEG, putting two temperature boundaries condition and...
View ArticleTime Dependent temperature variation on Aluminium due to scanning of Laser of...
Hi, I have just joined National Tsing Hua Huniversity as a PhD scholar. I am new to comsol. I am using comsol 5.3. I have been given a problem which is based on time dependednt heat transfer simulation...
View ArticleCartesian Product Of Two Shapes.
I know how to find the Cartesian product of two single sets (All sets with elements of both), however how do you find the product Speed Test of two fully graphed shapes? Scrabble Word Finder That is,...
View ArticleEuler-euler Model and chemical reaction
When I used the Euler-euler model under the multiphase flow module , I found that it could not be directly coupled to the chemical reaction. What should I do to add a reaction to the Euler-euler model?
View ArticleFeature request: reduce directory size by deleting solutions and meshes
I would find it so useful to have a script that sequentially loads all the mph files in a directory, deletes the solution data and the mesh data, and saves back the results. I waste lots of disk space...
View ArticleCoupling of PDES
I'm looking to solve a series of PDEs in COMSOL, but I'm not sure how to couple the four of them. There are four dependent variables. How do I couple them together so that I can use dependent variables...
View ArticleIon exchange membrane
I am currently working on a case where I want to make ions in a liquid pass through an ion exchange membrane into other chambers under the action of an electric field. How should this process be...
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