The error file java.log.3792 shows the following See log file: C:\Documents and Settings\XiaoQian\.comsol\v42\logs\server5.log" Opening log file: C:\DOCUME~1\XIAOPI~1\LOCALS~1\Temp\java.log.3792ĮRROR: Could not start COMSOL Application. Use the console command 'close' to exit the application "C:\COMSOL42\bin\win32\comsolserver.exe matlabĬOMSOL 4.2 (Build: 171) started listening on port 2036 When I start 4.2 Matlab LiveLink, it has the following errors: However, I was able to run COMSOL 4.1 Matlab Live link quite successfully for my optimization applications, although it is a bit slow, occasionally with Java out of heap error. My computer is a Dell Latitude XT2, Duo CPU GHZ, 2.95Gb of RAM. I think it has something to do with Matlab/java heap space. Make rectangle tall and skinny (W: 0.001 m, H: 0.I have difficulty in starting COMSOL 4.2 Matlab Live Link.Most similar to Laminar Flow between Parallel Plates.In Model Sub Menu, confirm that Boundary 2 only is selectedĬOMSOL Model 3 – Laminar Flow between Parallel Plates In Model Sub Menu, select Boundary Condition >Moving Wall.Define third Boundary Condition by describing the upper plate velocity.In Model Builder Menu, right click Laminar Flow and select Wall.Note that both Inlet and Outlet Boundary Conditions are zero pressure. In Model Sub Menu, select Boundary Condition > Pressure, no viscous stress. Also similar to Laminar Flow in a Pipe.In Model Sub Menu, select Boundary Condition >Wall Functions ĬOMSOL Model 2 - Turbulent Flow in a PipeĬOMSOL Model 3 – Laminar Flow between Parallel Plates Confirm that the y-Axis Data is velocity, spf.U ĬOMSOL Step by Step Models to be completed ĬOMSOL Model 2 - Turbulent Flow in a Pipe.In Model Sub Menu, select Data >Data set >From parent.In Model Builder Menu, right-click 1D Plot Group 1and select Line Graph.In Model Sub Menu, select Data > Data set > Cut Line 2D 1. In Model Builder Menu, right-click Results and select 1D Plot Group.In Model Sub Menu, select Data set>Solution 1 and enter Line Data:.Right-click Data Setsand select Cut Line 2D. In Model Builder Menu, expand Results.We will find the velocity profile as a function of pipe cross-section. Mesh granularity Results can be analyzed in many ways.Note the Reynolds number:ĬOMSOL Model 1 – Laminar Flow in a Pipe Time required to run your simulation depends on many factors: In Model Builder Menu, right-click Study 1and select Compute to simulate your model.Select Physics-controlled mesh, Normal Element size.In Model Sub Menu, select Boundary Condition > No slip.In Model Sub Menu, confirm that Boundaries 2, 3 only are selected.In Model Builder Menu, click Laminar Flow > Wall 1 Add no slip conditions at the pipe walls.In Model Sub Menu, select Boundary Condition >Pressure, no viscous stress.On the Graphic, select the right boundary Define second Boundary Condition by describing the outlet pressure.In Model Builder Menu, right click Laminar Flow and select Outlet.In Model Sub Menu, select Boundary Condition > Velocity.In Model Sub Menu, click Add to Selection.Define first Boundary Condition by describing the inlet velocity (average velocity).On the Graphic, select the left boundary.In Model Builder Menu, right-click Laminar Flow and select Inlet.In Model Sub Menu, select Physical Model>Compressibility> Incompressible flow.In Model Builder Menu, click Laminar Flow.Click Add Material to Model (click twice).In Model Sub Menu, select Liquids and Gases> Liquids > Water.In Model Builder Menu, right-click Materialsand select Open Material Browser.In Model Sub Menu, enter Width: 5 m, Height: 0.1 m.In Model Builder Menu, right-click Geometry 1 and select Rectangle.In Main Menu, select View > Desktop Layout > Reset Desktop MAIN MENU MODEL BUILDER MENU MODEL SUB MENU GRAPHICS.These notes apply to Version 4.2, only!.Model 3 – Laminar Flow between Parallel Plates.Several methods exist - one example is the Finite Element Method: ) +.How is the model solved at every intersection? Intersections are connected to provide “continuous” data.COMSOL solves the model numerically at every mesh intersection.User builds a model with significant variables.The General Idea Behind Numerical Modeling However, a computer simulation refers to the actual running of the program which contains these equations or algorithms.”1 “A computer model refers to the algorithms and equations used to capture the behavior of the system being modeled.Introduction to COMSOL Travis Campbell Developed for CHE 331 – Fall 2012 Oregon State University School of Chemical, Biological and Environmental Engineering
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