A question about mass flow rate inlet condition
Hello, I am trying to build up a model to simulate gas flow in a gas-solid fluidized bed. I am using k-w turbulence and wall functions for the wall boundaries and pressure condition for the outlet.. I...
View Articlevariable &
i simulation reactor steam reforming . The heat transfer coefficients have been entered into the : k_CO2 ((3.69*(TS[1/K])^(-0.3838))/(1+(964/TS[1/K])+(1860000/(TS[1/K])^2)))[W/(m*K)] Thermal...
View ArticleSqueeze flow: level set with moving mesh
Hello, I am new to the fluid module and am trying to simulate a liquid droplet being pressed between two plates where the plates are larger than the initial droplet (the other problem is much easier to...
View ArticlePlot radial and tangencial components
Hello, I need some help about the results of a cylindrical motor. I have a cylindrical motor defined in 2D. I have defined the cylindrical system "sys2", and now i want to see the radial and tangential...
View ArticleDifference between Time dependent and Time discrete
Hi, I am working on a conjugate heat transfer problem. By t=20s, the system reaches steady state. Then I would like to see the system response after t=20s, using step function to switch off a source...
View Articleusing multiple Comsol Windows simultaneously on Mac OS
Hi, until now I was unable to use multiple Comsol Windows simultaneously on Mac OS. Is that feature only available with the Windows version? Regards, Denis
View ArticleSimulate half of photonic crystal fiber
Hey guys! I have a little bit confusion of using comsol. I want to simulate a cross-section of a photonic crystal fiber. However, because its scale, I only want to simulate half of the fiber section....
View ArticleFluid velocity calculation in discrete fracture
Dears, Now I am simulating discrete fracture in a 3D space and I need to calculate fluid velocity inside fracture . So my question is should I multiply by fracture aperture during calculation or not u=...
View ArticleFluid velocity calculation in discrete fracture
Dears, Now I am simulating discrete fracture in a 3D space and I need to calculate fluid velocity inside fracture . So my question is should I multiply by fracture aperture during calculation or not u=...
View ArticleComparing comsol plots
Hi all, Am doing an optimization study to find the best boundary condition suitable for my application. I have simulated my design with various boundary conditions and have obtained the plots. please...
View ArticleMismatch between calculated answer from Comsol and Matlab
Anyone know why the result generated from Comsol (4.2) different from the result calculated by using Matlab? I am doing 2D mode analysis for photonic crystal fibre, i draw and defined all parameters...
View ArticleThermoelectric Effect - Adding the physics
Hello, I'm working in a project on thermoelectric generator. As 'Thermoelectric' physics interface,is not in the physics area/physics list, I was trying to add the physics using the steps given in the...
View ArticleEigen frequency analysis
hi, i am dealing with a nanotube sensor...can i use eigen frequency study step to find frequency at which displacement is maximum or should i use some other study step..
View ArticleConvergence problem with Open Boundary condition - No viscous stress
Hi, I'm modeling fluid flow through a 2D porous media using Darcy's Law. I intend to estimate fluid flux values across the top boundary of model, however,my desired outputs will be one in which the...
View ArticleSimulating Rayleigh II integral
Hi, I have been trying to calculate the propagation matrix that is found in Rayleigh II integral, using simulated data from COMSOL. I want to use such matrix in pressure-to-pressure calculations with...
View ArticleOpening surface plot
Hi all, I'm trying to open out or unwrap a 3D cerebral aneurysm dome to see the plot as a 2D flat plot, if that makes sense. I have a coupled model with laminar flow and transport of diluted species. I...
View ArticleCFD Immiscible Multiphase - Mixture Model vs. Level Set
I am looking to model water droplets flowing in an oil pipeline, where the water concentration is roughly 5% by volume. The flow will be turbulent. The objective of the model will be to measure...
View ArticleLorentz force calculation
I am trying to obtain the Lorentz force generated by a coil to a workpiece. I am integrating the Lorentz force over the entire domain (i.e. workpiece), but I was just wondering if COMSOL uses the...
View Articlehow to switch boundary conditions between float potential and ground?
Hey I was trying to switch the voltage between ground and float to a boundary in electric current physics. I can either apply floating or grounding condition to a boundary, but not able to switch these...
View ArticleSurface to Surface Radiation - material defined emissivity not being applied...
Hi - I'm doing an analysis involving Heat Transfer with Surface to Surface Radiation. With the model set up, the software does not appear to recognize emissivities as defined in each particular...
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