Coupling between to physics in comsol multiphysics 5.0 (in time)
Hi all, I am trying to model a droplet that impacts on a porous medium and penetrates this porous medium. The first thing I tried is using two physics: laminar two phase flow level set (for the falling...
View ArticlePhase change in porous media
Hello, I am modelling a geothermal system, where a porous rock is saturated with groundwater and heated by an intrusion of magma. I have used 'Heat transfer in porous media' coupled with the 'Brinkmann...
View ArticleHaving an issue to get mixture of fluids under time dependency
Hello, I've been having issues with my model on trying to get it to converge. My model is very simple, it is a rectangle( denoted as the cross section of a pancrease) with an inlet of glucose, while...
View ArticleTime Dependent flow model, HELP! Mr. Ivar!
Dear all, I created a cross section of a pancreas denoted by a rectangle with two circles in it denoting islets, which secrete insulin. My model is based off a paper written by peter buchwald. Here are...
View Articleconcentration in solute trasnport model
Hi all, I have a 2D model, coupled Fluid flow with solute transport in order to simulate the nitrate concentration inside my domain. I have soil column, which the left angle, is river and in the right...
View Articledroplet modelling
can anyone tell me the correct procedure for modelling a water drop on wetted surface.... i used 2 phase flow level set and phase field... but its not working.. i jst want to make dat drop on the...
View Articledroplet modelling
Hi naveen, i am trying to model a water drop on a wetted surface by using 2 phase level st and phase field models.. But result obtained is not right.. can u tell me the correct procedure to do it....
View Articleundefined pressure variable error
Hi! I am new to comsol and I created this toy model to play with in order to get a better understanding. The model intends to simulate the rizing air in a cylinder. The cylinder has an inner and outer...
View ArticleDifference in 3D simulation of duct to rotated 2D simulation?!?
Hi everyone! I created a simulation for a circular duct which is heated by a constant heat flux. Does it make a difference to simulate a 3 dimensional geometry or a 2 dimensional geometry (rectangle:...
View Articleheat transfer in circular tube with constant heat flux
Hi everyone! in this case Heat transfer in a circular tube is simualted using Heat Transfer in Fluid interface with temperature as inlet at one end, outlet BC is used at the other end, constant heat...
View ArticleDrug delivery patch
Hi everybody, I'm trying to model fluid flow resulting from mesh deformation in a porous patch adjacent to a saturated compartment. Basically I have two compartments: one porous (where I specify...
View ArticleFSI,,cylinder,,Splitter plate
There are Two cases.In the first case the solution converges and gives an accurate result. However in the second case, the solutions diverge. case 1: The circle and rectangle are attached. Only the...
View ArticleCOMSOL Failed to find a solution error
Hello, I am getting an error message: Failed to find a solution. Maximum number of Newton iterations reached. Returned solution is not converged. - Feature: Stationary Solver 1 (sol1/s1) This message...
View ArticleMRF modelling
Hello Sven, I am currently modeling the same scenario like the one that you mentioned in your post. 1)I was thinking about defining the MRF fluid by inputting experimental data for dynamic viscosity...
View ArticleFree and Porous Media Flow: Prescribe displacement
Hi everyone, Is there a way of applying a prescribed displacement to a boundary of the Porous Matrix in a Free and Porous Media Flow model? Thanks for your support! Regards, Andre
View Articlepost processing ver. 4.2a
Hi, I'm working on three-dimensional microchannel fluid flow.. My question is: How can I view the results on a specific domain? If I have domains 1 ,2 and 3 I want to view the velocity field on domain...
View ArticlePhase change for salt water
Hello, Does anybode know how to model heat transfer with phase change or melting front for saline water? How to model process of increasing salinity in water during ice grow, and decreasing of freezing...
View ArticleA collapsible tube problem
I am trying to build a model of a steady flow in a collapsible tube with FSI module. I have gone through every sample models and forum threads I could find online. Based on the suggestions from Ivar I...
View ArticleStudying deformation in a porous structure (Brinkman equation)
i am working on studying stress and deformation in porous media as fluid flows through it ... i tried using solid mechanics, but it considers the porous structure as impenetrable solid. And if i use...
View ArticleChanging the material's Phase (state)
Hi, I am working on laser machining of metals and I am trying to model the process by COMSOL. What I have done is thermal modelling which shows the temperature distribution in the sample. I am...
View Article