How to add the periodic boundary conditions into Darcy module ?
In COMSOL 5.2, there is no periodic boundary conditions in Darcy module,however, periodic boundary conditions are needed in the problems of my research ,so I should like to express my appreciation to...
View ArticleComsol in Ubuntu 18.04 always crashes after clicking Compute button in Study.
The issue happens even with very simple models, for example Heat Transfer by Free Convection. I can open files files, look at the results, but if I choose click Study, then click Compute, Comsol after...
View ArticlePicosecond laser heat of solid-liquid system
Hello Users, I am modeling the heat transfer between a metal nanoparticle in an aqueous medium (water) when subject to a picosecond Gaussian pulse. At present, I am assuming classical heat diffusion...
View ArticlePeriodic structure with oblique incidenting circular polarized light
Dear All, I am writing to you all for help. These days i have been simulating a 3-D model of a periodic structure with oblique incidenting circular polarized light. But I have encountered some problems...
View ArticleSimple plate acoustic radiation issues
Hi, I am struggling with the simulation results from a model which considers a 0.5x0.4 m^2 aluminium plate (with 0.004 m thickness). In particular, I am performing an eigenfrequency study through a...
View ArticleModel a closing mold
Hello, I want to optimize the cooling of a non-newtonian fluid while the mold is closing, so the fluid is beeing compressed. Can I model the closing mold? Or should I just model the compression with a...
View Articlehow to set the integration variable in derived value part
Hi, I build a model in electrostatics, AC/DC model. I define a angle named 'thita' in global definition which equals to atan(r/z) of the geometry. Now i have simulated the potential of geometry, and i...
View Articlehow to set the integration variable
Hi, I build a model in electrostatics, AC/DC model. I define a angle named 'thita' in global definition which equals to atan(r/z) of the geometry. Now i have simulated the potential of geometry, and i...
View ArticleParticle Tracing Will Not Let Me Select Inlet
Hi,I hope someone can help. When I run a computation, I get the message:The release or inlet features have no selection. Add a selection to at least one of the release or inlet features.When I attempt...
View ArticleDynamic tip bending
Hello,I have a circular tube that is approximately 150 mm long and the last 15 mm of the tube (the tip) will deflect 30 degrees to -30 degrees. I have a velocity inlet and a pressure outlet. I want to...
View ArticleImport model domain selection
Hi, I am facing a problem in domain selection of import file .how can i select domain of import file accordinly. I imported a helical fin pipe .I want to select pipe and helical fins as a different...
View ArticleCharge discharge cycle for LFP cell thermal management
In comsol , for thermal management of battery it is running in charge and dischage cycles , but I want to just discharge the battery from some initial temperature . how it can be done in COMSOL 5.3
View ArticleOblique incidence For Scattering of 2D cylinder
Dear all, I am simulating the scattering from a 2D PEC cylinder. The E field is along the z axis of the cylinder. Under normal incidence I write the background E field as follows.Ex=0 Ey=0...
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Sign convention in weak form pde expression
The below post is related to an archived discussionHi all,JM Buchot had earlier posted a model which solves for flow over cylinder using weak form PDE. Weak form expressions of Navier Stokes equations...
View ArticleHeat and moisture transfer in building material
Hi, I have simulated a wall and floor (2D) under staitionary situation. results shows relative humidity of more than 100% in some part of my model! 1- is this relative humidity for material or for the...
View ArticleHow can I edit boundaries in a moving mesh?
Hi everybody, I have got an expanding cylindrical domain and I want to create a hole at a certain length (in order to set pressure at 0 at that boundary), which is not present in the initial geometry....
View ArticleBuilding Of Helical Fins On Circular Pipe
Hi, I want to build helical fins on circular pipe in COMSOL version 5.3. So ,i am facing a problem to generate SWEEP. Below i am attaching a typically JPG file. Please prvode me idea about this.
View ArticleCompressibility in Fluid-Structure Interaction
Hi Everyone,I am performing a simulation using the FSI interface in Comsol 5.3. In the settings of the FSI under the physical model where we select the compressibility option, there two options are...
View ArticleModelling of potential field and redox reactions from electrodes in agar...
Hello,As part of a student project, we are trying to model the potential field in a block agar. Four electrodes pierce into the agar, as can be seen in the uploaded model. The agar will contain NaCl at...
View ArticleMoving-Mesh
The below post is related to an archived discussion[start here] Hi evreybody I need some examples about moving-mesh I want to apply it on my simulation for piezoelectric fan in electronic cooling ,,...
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