Weak contribution to levelset interface
Dear all, I would like to add a weak contribution (for surface tension) to a moving levelset interface for the following application: I want to model a fluid with a free surface, on which there should...
View ArticleProblem with moving mesh
Hello I'm trying to build a 2d-axis model of laser heating process, which will melt the powder bed. The free-surface will deform according to the surface tension and mass loss due to vaporization. Here...
View Article3d Laminar Flow
Good Afternoon I´m trying to run a very simple 3d simulation about an air flow that flows through a cylinder (radius=1,75mm) inscribed in a cube(side=4.3mm). Now, when I put between the inlet and...
View ArticleMultiple-size particle tracing
Hello everyone I have a short question on the particle tracing module. Does anyone know that whether it is possible to simulat particles of different sizes in the same model. How to implement this...
View ArticleHow to simulate the water boiling by Level-Set method
There is a good example simulating water boiling by phase field. I am trying to use the Level-Set method. However, I was frustrated by many times of failure. My problem is how to deal with the...
View ArticleContinuous Casting
Hi, I am modeling solidification of casting process using the following model:www.comsol.com/model/continuous-casting-382 The alloy I am using is different hence the parameters are different. The...
View ArticlePlot data to Export - Number of data points
Hi all, How can i determine the number of data 'points' (for example in txt) of an exported plot? For example, the velocity profile of a fluid flowing inside a cylinder(with D diameter) , may have a...
View Articleinternal variable porosity permeability
I, beginner to COMSOL, am using poroelastic model in COMSOL fully saturated porous medium, all the pores are filled with fluid. Hence porosity is equal to the ratio of volume of the fluid to the total...
View Articletwo phase laminar flow in 3d
hi I m supposed to simulate two-phase laminar flow problem (moving mesh). the size of a cyl is , r=5 h=5 The bottom of the cylinder is fixed and the top of the cylinder is moving with a certain speed...
View ArticleParticle trajectory. it seems to be same velocity regardless of size of...
Hi. I'm trying to simulate particle tracking in the fluid(water) and my situation is laminar flow. And I applied Drag force, but the particle is moving to same direction. I think the particle shows...
View ArticleTrouble coupling heat transfer physics for both fluids and solids
Hey all, So I'm getting stuck with my model where I try to couple three different physics. The three physics are: Electric Currents, Heat transfer in Solids, and Heat transfer in Fluids. Basically what...
View ArticleWhich interface choose for fluid flow with heat transfer
Good day! I would like to ask for an advice. I wish to solve the following problem: I have a plate of a solid material with low thermal conductivity. There is a pipe with cold water inside the plate....
View ArticlePulsating liquid surrounding the human brain
Dear COMSOL community, after reading the COMSOL documentation and this forum for a couple of weeks I am reaching out to you. I am using COMSOL V4.4. I have been desperately trying to run my simulation...
View ArticleMixing of Water in a Flat Bottom Mixer
Hi, I am doing the tutorial for the Mixing of Water in a Flat Bottom Mixer model according the instructions available on the COMSOL site, and after I insert the geometry sequence and click the Build...
View Articleserval questions of heat transfer in my project
Hello As the figure shows, I am using the fllowing models (Heat Transfer>Conjugate Heat Transfer>Laminar Flow Stationary situation Surface-to-Surface Radiation), and try to find the temperature...
View Articlelaminr vs turbelent
hello ! my model is PV cell with duct embedded below in order to cool it down . I used laminar conjugate heat transfer ,so the result show good .But depend on Reylond number the flow is turbulent so I...
View Articlemeshing
hello ! my model is rectangular PV panel(6 mm thickness) with embedded duct of height 30cm . I used conjugate heat transfer to compute the temperature of PV how can I mesh this component in right way...
View ArticleNon-Convergence
Hi, For a particular simulation, a time dependent problem converges for a lesser time period, say 4 hours. But as we increase the time say 12 hours the same problem doesn't converge. What could the...
View ArticleIs there any possibility to model rotating porous media in comsol?
We are to purchase COMSOL; however, we will be having a system with a rotating porous media. Can the free and porous media flow be coupled with rotating machinery module? On the advanced stages of our...
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