Modeling endovascular ablation
Hi, I am trying to model endovascular ablation. I checked the video tutorial on tumor ablation, and used some tips from it, but in my case, I also have a laminar (blood) flow within the vessel. My...
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 ArticleThe gravity term in the two-phase Darcy's law (v.5.2a)
Hi, The two-phase Darcy's law of the version 5.2a doesn't have the gravity term. Is there any way to solve this problem? Thanks. Youngmin
View ArticlePressure condition in two-phase flow
Hi to everyone I'm trying to develop a model about the free-surface evolution of an spherical air-bubble in the water under large pressure difference, which is a typical two phase flow. Due to the...
View ArticlePeriodic flow condition
Hi, I am confused about how to use the periodic flow condition. For example, laminar flow with a constant pressure difference in inlet and outlet in a very long circular tube，I want to model just one...
View ArticleGas Metal Arc Welding (GMAW)
hi, I want to simulate Gas Metal Arc Welding droplet detachment, transport and impingement into the weld pool considering the effects of gravitation, surface tension, and electromagnetic force. Is it...
View ArticleInlet stream under an angle
Hi, I want to simulate a fluid flow that enters a room under an angle. I can't use a cylinder (which I rotated to achieve the right angle), because I am not able to use one end as an inlet and I don't...
View ArticleNatural convection in a cavity description
Dear colleagues, I would like to kindly ask for advice about natural convection description in Comsol. Namely, I have a cavity filled with Argon at initial temperature of 0 degC. One of its surfaces...
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 ArticleInvalid field variable in property Llimitfivar
Hi, I'm new to Comsol 5.1 version and i have a problem with my simulation. Does anybody know what "Llimitfivar" is? I'm searching for it's meaning for some time and i can't find anything. I have no...
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 ArticleDean flow at low Re
Hello, I am trying to simulate the Dean Flow in a U-shape rectangular channel. The total length of the channel is ~14.5 mm (10 mm straight + 180° circular curve of radius R=0.5 mm + 3 mm straight), and...
View ArticleVariable particle properties
Hello, i am modelling a tube that is heated externally (heat flux mode). The air stream that is flowing inside the tube is heated from the hot walls. I want to add few particles in the airstream so i...
View ArticleModel Parameter Adjustment
Is there an operator I can use to determine the position where the average value of a dependent variable (of a 2D geometry) will reach a particular value? To be clearer; I have a three PDE that I am...
View ArticleConjugate heat transfer
Hallo, I have doubt regarding maximum newton iterations reached in comsol 4.3b. I am doing project that includes both heat transfer and fluid flow. So i am using Conjugate heat transfer. While...
View ArticleNavier-Stokes Simulation using Coefficient Form PDE
Hi: I need to simulate fluid flow in a triangular duct, but I need to run it on a high reynold number. The problem is that when I run the model using the default "Laminar Flow" physics tab, I need a...
View ArticleConjugate heat transfer
Hallo, I have doubt regarding maximum newton iterations reached in comsol 4.3b. I am doing project that includes both heat transfer and fluid flow. So i am using Conjugate heat transfer. While...
View ArticleModelling a given volume-pressure relation (CFD)
Dear community, I am a COMSOL-beginner and I need some help realated to a problem. I have a 2D-Model, which is basically a rectangle with fixed walls, a fluid inside and one wall as a velocity inlet....
View ArticleVibration of a cylinderical solid body due to fluidic vortex.
Hi there, I'm new to COMSOL and trying to model a fluid flow across cylindrical shaped solid bodies in 2D. The model should produce a vibrating (varying the displacement) cylindrical body with the...
View ArticleLaminar flow and automatic remeshing on fold up edge
Hi all, I'm working with this model since a long time, but I cannot make it works fine. I'm simulating a model in which an external pressure acting on a limited area pushes on a viscous liquid that is...
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