Issues with Pipe Flow and Surface Radiation interaction
Hello Comsolers! I am very new to the program, and I am having some issues regarding Non Isothermal Pipe Flow, Heat Transfer in Solids, and Heat Transfer with Surface to Surface Radiation. I have a 1D...
View ArticleList of function in Comsol 5.2
Dear All, Can anybody help me with finding the list of inbuilt functions of comsol 5.2. I want to equate my equation in the expression box of 1D plot group. I am using heat transfer module for...
View ArticleVariable boundary conditions
Hi all, I'm using the API to run my COMSOL model multiple times in a loop in MATLAB with different initial and boundary conditions. I was just wondering if it would be possible to set the initial...
View ArticleHeat Source in Turbulent High mach number flow !
Dear COMSOLERS ; I am trying to simulate an electric arc in a flowing gas through a nozzle. as you can see in the attached model, the arc heat is been added as a heat source in the hmnf interface. also...
View ArticleMoving Mesh issue at the inlet/outlet
Hello, I am working on a 2D model on a channel with some obstacles. The study is time-dependent and I have used the Moving Mesh (ALE). The lower boundary of my model is moving down. The inlet and the...
View ArticlePlasma plume expansion induced during laser ablation
Hello, We are trying are to set up a model to study plasma plume expansion induced during pulsed laser deposition. Model is based on compressible Navier stokes equations consisting of mass, momentum...
View ArticleRotary woofer simulation
Hello. I am trying to simulate this recently developed rotary woofer:www.rotarywoofer.com/www.jpark.us/pubs/JASA_125(4)_RotaryWoofer_2009.pdf My main goals are to find out air flux and energy flux...
View Articlehow to use two boundary conditions at same boundary
I have been solving darcy's module in which i am supposed to add BCS of inlet pressure as well as mass flux which is at same boundary. But when i add 1 boundary condition it gets overridden by another...
View ArticleEnergy balance with variable density
Hello everyone, I am interested in finding the temperature in a system that changes the density in time and I would like to formulate the energy balance using this variable density. What I have in mind...
View ArticleModify continuity on internal bounderies
Hi everyone, I have some doubts about how to modify continuity condition on internal boundaries and I would ask for some help. I want to solve hydrodynamics on a unit cell of the Taylor flow (known...
View ArticleAbout check the fluid setting
Hello when i calculate the fluid model where and How could i know the Reynolds number and Stokes number?
View ArticleBoundary condition
How to impose perfect contact (equal displcaement) between internal boundaries of different surface (resin-mold interface).
View ArticleDefining a variable limited only for the boundary
Can we define a dependent variable for a physics which is only valid for particular boundary and not for the whole domain?
View Articlecone-jet mode in electrostatic field
Hi, Here is my problem. I want to simulate a electrohydrodynamic (EHD) phenomenone , a nozzle with full water (or electrolyte) in a electrostatic field, the the water is polarized and deformed the...
View ArticleForm assembly or Form union
Dear All, I encountered a problem when I models fluid flow through conduit surrounded by solids at two sides. The models involves laminar flow module and structure module. According to the description...
View ArticleWarning: SOR line did not find any lines.
Hi everyone, I am running a laminar two-phase flow (level set) simulation with a 3D geometry. I had previously simulated the same geometry in 2D with the same initial values and boundary conditions and...
View ArticleHow to add a mass source term to NS equation
Hello everyone I have a problem in adding a mass source term to the NS equation. I use it to account the mass loss due to vaporization during laser melting process. Currently I use the interface moving...
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 ArticleGas mixture flow simulation
Hi everybody, Gas 1 is flowing in my geometry (a round pipe) and I want to inject gas 2 into the flow. My idea was to assign both gases to the same geometry (using pipe flow module twice) and then use...
View ArticleMatrix has zero on diagonal
I have to solve a lid driven cavity (laminar flow) + melting problem (heat transfer in fluids and solids with moving mesh). I was able to successfully implement this in 2D. I have now shifted to a 3D...
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