Problem: Oil Droplets Seem To Dissolve In Water (Two-Phase Flow, Level Set)
I have a problem with my "Two-Phase Flow, Level Set" simulation in COMSOL 4.2. I am trying to simulate the formation of oil droplets in water by hydrodynamic flow focusing. The water and oil are...
View ArticleCOMSOL Releases COMSOL Multiphysics version 4.3a
We at COMSOL are proud to introduce version 4.3a of COMSOL Multiphysics to the COMSOL community See: www.comsol.com/products/4.3a/ This introduces: * LiveLink™ for Excel® * LiveLink™ for Solid Edge® *...
View Articlebuilding piezo ring projector (electroacoustic transducer)
Hello, I plan to build piezo ring projector, but I don't decide to build it as 2d axis symmetry or entire 3d model. My electrodes would be located circumferentially. 2d model would be problem because...
View ArticleTime dependent adaptive mesh refinement
Hi I'm trying to make a CFD model where the flow is driven by the motion of the walls. To do so I coupled a moving mesh and a laminar flow model. First I solved a simple geometry using 2D axial...
View ArticleAre all post-processing function only using single CPU core?
Hi all, I'm doing 3D eigenvalue simulations. I noticed that I can used pardiso direct solver to take advantage of multi-core CPUs. However, when I went to the point of post-processing, e.g. exporting...
View Articleabout doubt about amgnetic ferrite core
Dear all , i have small doubt , how to apply ferrite core to coil and model the geometry , in attached model , i created a rectangular and iron and renamed and changed a relative permeability of 1500 ,...
View ArticleTemperature discrepancy
Hi, I am modeling a simple conduction problem in solids. When I model my geometry as a unified body, I get a maximum temperature of 358. But when I split my geometry into subdomains and define a heat...
View ArticleAdsorption model almost working!
Hi there, I'm trying to design a simple model. There's an inlet concentration of a species "cp" that will be adsorbed to a circular surface located at the center of the microfluidic cell (I named the...
View ArticleRotation
Hello, I am trying to allow the remanent flux density within a magneto-active elastomer (MAE) to rotate with the elastomer as a magnetic field is applied to the material. Within the ampere's law that...
View ArticlePZT/piezo material properties
Hi, I am working in version 4.3a structural mechanics module with Piezoelectric Material Model. I am a little confused about which material properties are which in the matrix. The input field for the...
View ArticleMesh Problem?
Hi, guys. I got some problem with this message after computation. 'Failed to find a solution. Singular matrix. For mesh-case 0 there are 1 void equations (empty rows in matrix) for the variable...
View ArticleInverted mesh element warning / error.
Hi all, I'm new to comsol and trying to run the electrostatically actuated beam tutorial. I follow all the instructions and then when I run the simulation, I get 4 inverted mesh element warnings that...
View Articlea question about the poroelasticity module
I noticed in the poroelasticity module, the stress is total stress. How can it be connected with pore water pressure or effective stress in the software? Thanks a lot!
View ArticleNVIDIA driver 305.93 causing erratic behavior
COMSOL was working great until I got a Tesla NVIDIA GPU. After installing the driver NVIDIA 305.93 I started getting erratic behavior when mouse clicking on the graphics. When I click to highlight a...
View Article[Solved] Selection Left Click
Hello community, I am faced with a strange problem. I just updated to Comsol 4.3 after using 4.2a for a long time. But it seems I can't left-click on an object to select it anymore. I don't know...
View ArticleSwitched reluctance motor - rotor and stator deformation - How?
Hi. I am building a 2D model in which I would like to showcase how the stator and especially the rotor of a switched reluctance motor deforms because of the radial and tangential magnetic force on the...
View Articletime and position dependent reaction
Hello everyone, i am very new to this and not sure which moduls of the comsol software are needed to solve my problem. there will be a phase change with heat production(white box-> black box in the...
View Articleinterference between two waveguides.
I want to see the interference between two waveguides. It is simple. There are two waveguides. And laser inputs are on the end of the waveguides. So I need two inputs. By using a boundary mode analysis...
View ArticlePumping from atmosphere to vacuum state
Dear all, Suppose I got a 1 m^3 cube with one pumping port. Is that possible I can simulate the pressure of the cube related to pumping time? Any comments are very welcome. David
View Articlehow to excite coil in 3d
dear all can you pleas etell em how to excite a coil 3D -- kishore Naik Mude
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