Laminar Flow: Time Dependent VS Stationary
Hello everyone,I am new to COMSOL, the example that I am trying to simulate is a sphere inside a pipe with laminar input. I obtained the stationary and time dependent solutions for the same.I would...
View ArticleDifferent settings in Comsol 5.4a
Dear sir, We found that the same model which can run in Comsol 5.3a report errors in Comsol 5.4, it showed the partial defferentiation of y-axis of u(displacement) was undefined. The warned expression...
View ArticleCombining Acoustic With Laminar Flow
Hi all, did anybody combining laminar flow with acoustics? i cant combining them
View ArticleDeformation under gravitational force
Hi, i'm Maria and I begin to use Comsol for my master thesis. I have to model a female breast, in order to study how the gravitational force influences on it. First I choose my geometry (a simle...
View ArticleTime dependent power source in thermal analysis
Hi,I am pretty new to Comsol and I've searched here and there for my answer without success.I am doing a 3D time dependent thermal analysis. In the studied time, I need the power source to change...
View ArticleHow to calculate the distance of a particle which flow through a channel?
As the title shows, I want to calculate the distance of a particle which flows through a channel. It is easy to simulation the track of paricle which flows through a channe in CFD model, but how to...
View ArticleFalling weight simulation
Hi all, I'm new in Comsol and i'm trying to study the software, with some difficulty. My simulation consists in a weight of 10 Kg falling from a height of 85 cm on a plate with a diameter of 300 mm ,...
View ArticlePlotting Acute Angle of Incidence
Hey guys I am new to comsol and I am trying to plot either in a table or a graph where the max erosion occurs (angle) in a 90 degree elbow in a pipe. The variable I am trying to plot is fpt.phii and I...
View ArticleConcentration Source Term in Wrong Units?
Hello,I'm trying to set up a 1d, axisymetric, reaction-diffusion problem.I'm using 'coeffecient form' of the PDEMy dependent variable in concentration in [mol/m^3]My source term should be a...
View ArticleCreation of .mphbin file
The below post is related to an archived discussionHi! I am new in COMSOL, I need to know, how to create .mphbin import geometry file in COMSOL 5.3a?
View ArticleHow to solve a series of functions based on the result of each step
Hi, I'm working on a time dependent heat transfer problem. At the end of each time step, I need to calculate some values based on the result from comsol solving nonisothermal model. I need to use the...
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Fluid Flow in a Pipe in Microgravity Conditions
Hello Everyone! I would like to model fluid (water) flow through a pipe with microgravity conditions. I have noticed that in the settings of the Turbulent and Laminar modules there is an option that...
View Articledroplet volume decreasing, when I use two-phase flow Level set method.
Hello Everyone,I am trying use two-phase flow level-set droplet spreading on superhydrophobic surface. However, the droplet volume always decreasing after acheving equilibrium state.Please share your...
View ArticleOptimal shape design of a PZT
Hello, how can I achieve it that I'll optimize the shape of a rectangle PZT to a new shape which can motivate a same vibrational mode with the rectangle PZT. The new shape may be composed of** several...
View ArticleUsing a tesselated surface as an interface in a solid for solid mechanics...
Dear Community and COMSOL Employees,I have a 3D scanned volume of a carotid artery, and seperate volumes of calcifications and other constituents, these are not mutually exclusive so some might overlap...
View ArticleNegative mass fraction problem
Hi all,I am trying to simulate a furnace that has combustion reaction using a stationary solver. I use eddy dissipation model. Turbulence is modeled using k-eps model. I use transport of concentrated...
View ArticleLaser cladding tutorial
Hi everyone, I'm a student and for my thesis I have to model a laser cladding process/ powder direct energy deposition with laser. I never used COMSOL before, so I want to ask if someone have tutorials...
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Solid Mechanics equation doesn't line up with documentation
Hello,I'm trying to better understand the workings of the solid mechanics module, and I came across an apparent discrepancy between the documentation and the module itself.The momentum balance equation...
View ArticleFluid Coupling using an initial velocity condition
Hello Everyone,I am fairly new to COMSOL Multyphysics and I would appreciate any help.** I am using COMSOL Multiphysics 5.3a**. I am trying to model the 2D-fuid flow (convection and diffusion) of a...
View ArticleInlet and boundary conditions
Hi everybody,I have modelled my own weak form pdes from Naveir-Stokes equation for channel flow. Now, I do not know, how can I implement my inlet and outlet boundary conditions in this sitiuation....
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