COMSOL Discretization Scheme
Hello I am working on a time dependent study using the MUMPS Solver. My question is: Which discretization scheme does MUMPS solver makes use of? COMSOL does not provide this information and I need to...
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 ArticleTIC Nozzle Simulation
Hi, I am a starter here, and trying to simulate the Nozzle flow by the new feature of this edition, High Mach Number Physics. I already came up with the contour of it and import it into the comsol. I...
View ArticleNanofluid evaporation under radiation
Hello, I am new to COMSOL multiphysics. I am trying to simulate nanofluid (2% by volume graphite nanoparticles in ethyl alcohol base fluid) evaporation. I am considering just one single droplet in air...
View ArticleEvaporation chamber of absorption refrigerator
Hi there. Im currently trying to set up a model of an evaporation chamber of an absorption refrigerator. There is a pipe leading water into the chamber at vacuum(around 50 mbar) and at temp 30 degC....
View ArticlePoroelasticity - stress conflict
Dear all, I simulated a geothermal reservoir (cubic) which is stimulated by a "massflux" through a sphere. I think my model runs and works as it should. I calculated the pressure and get results as...
View Articlefluid injection - negative stresse
Dear all, I simulated an injection into a reservoir and get negative principal stresses. This means that the stress behaviour is compressive. I applied a "mass flux" (Darcy's law) in Poroelasticity...
View Articletransient simulation using pipe flow module
Hey im trying to model 2 concentric pipes, in the inner pipe there is hot water flow(forced convection) and in between the pipes there is closed gap with cold water(natural convection), the outer...
View ArticleHow to simulate water wave
Dear all. I am a new Comsol user. I want to simulate the water wave by comsol Anyone can give me suggestion or recommendation (Which physic interface, how to config)? Thank you
View ArticleHow to simulate water wave
Dear all. I am a new Comsol user. I want to simulate the water wave by comsol Anyone can give me suggestion or recommendation (Which physic interface, how to config)? Thank you
View ArticleFlow between vibrating plates
Hi, Brief intro about my project: Two asymmetrically walls, create a channel that can rapidly open and close. Water rushes into the channel when it expands and is forced out when it contracts. I am...
View ArticlePoisson-continuity coupled equation
Hello, I try to model the corona discharge in wire-cylinder geometry governed by the equations: nabla (V) =- rho/epsilon0 (Poisson equation) and grad (rho) * grad (V) = rho ^ 2/epsilon0 (equation of...
View ArticleCoupling Darcy's law with Navier-Stokes equation - convergence problem
Dear Comsol-Community, in the hope that someone of this great community might help me, I will try to explain my current problems with coupling Darcy's law and laminar flow. Basically I want to study...
View ArticleFlow from 1 domain to another
Hi there. Maybe someone can help me with this. Im trying to set up a model(se picture) where water flows down in a pipe(its turbulent), and it enters another domain(the chamber. The squares at the top...
View ArticleCalculating concentration boundary layer thickness
Hello, I am running a simulation where I am blowing air over a water surface. My goal is to characterize the boundary layer thickness as a function of position. I was wondering how I can use COMSOL to...
View ArticlePseudo time stepping for stationary equaitons
Hi all, i ma using COMSOL 5.1 and couple Darcy law and heat transfer. i was trying to find a way to add pseudo time stepping to my stationary study but could not find the option. does anyone know if...
View Articlebulk concentration
Hi I am working with a 2D axisymmetric geometry of the arterial wall. I am solving transport of diluted species (time dependent). I would like to compute and represent the partitioning coefficient (k),...
View ArticleImpeller simulation with fluid-structure interaction and deformed mesh
Hello Everybody, i try to simulate different impeller geometrys and analyse the different resulting fluid velocities. Therefor i started based on this comsol blog...
View ArticlePrevious Solution Node is not working with Fluid flow
Hi everybody I'm currently trying to simulate the evaporation von water out of meat during a vacuum-packaging process. I'm using Comsol 5.0. The fluid flow in the chamber is simulated with a turbulent...
View ArticleCoupling of 2d axially symmetric geometry with 3D-T-junction
Dear all, I am modeling a flow simulation where I would like to couple axially symmetric tubes to a 3D T junction (pipe flow would not be an option for me as my fluid flow is a little special - I need...
View Article