comsol parametric sweep vs auxiliary sweep

Posted 13 aot 2012, 00:06 UTC+2 Version 5.2, Version 5.2a 2 Replies . I am using a 2707 waters HPLC device. Review the topics in the table of contents, or browse Webinars for more great material. I changed the needle and calibrated its position but I still get the same problem. I would like to know how these two differ and when one is more suitable than the other, and also about the performance (which is faster) when you can use both. As a result, selecting and then testing different materials is oftentimes necessary. Version 5.0 A parametric sweep allows you to change the parameter values through a specified range. All my attempts have failed (I have tried to put all the parameters in the auxilary sweep, setting the . It also uses the previous solution as initial guess for the next parameter step, speeding up convergence of each step. COMSOL AB. If you find a case where this automatic detection does not work, please report it to COMSOL support. The auxiliary sweep is suitable to use if you are not having any geometry change, parametric sweep is suitable it you are to change a thickness, length, diameter etc. When I make changes to this parameter, COMSOL is able to apply the change to these variables when I press the update button without re-solving the physics. I even get How to do Piezoelectric coupling in ANSYS-APDL or COMSOL between tapered substrate and rectangular piezoelectric patch? When I make changes to this parameter, COMSOL is able to apply the change to these variables when I press the update button without re-solving the physics. In this tutorial video, we will teach you how to implement a parametric sweep with the COMSOL software. It is very useful. Your internet explorer is in compatibility mode and may not be displaying the website correctly. 17 Recommendations . I have had a similar problem right now, in Comsol 4.4. Hi, im trying to make a projection in a 3d comsol model. Best, If you still need help with COMSOL and have an on-subscription license, please visit our Support Center for help. Parameters, Variables, & Functions, Studies & Solvers, Structural Mechanics, Error: Failed to compute elastoplastic strain variables, Running parametric sweeps, batch sweeps, and cluster sweeps from the command line, How to Add Stop Conditions to Solvers in COMSOL Multiphysics. Exercise Files 1) Right click on 'Data Sets' in 'Results' section and click on 'Join'. We will continuously update the Learning Center with new topics and materials, so be sure to check back often! Any ideas? Instead of having to manually change the materials specified in your model and re-solve your simulation each time, you can automate this process in the COMSOLMultiphysics software by performing a material sweep. Your internet explorer is in compatibility mode and may not be displaying the website correctly. Do they? You have reached the end of the Learning Center. . Yes you can do that. Yes you can do that. All rights reserved. Just make sure to set 'use parametric solver' under the Parametric Sweep > Study Extensions to 'OFF'. The parametric solver is also a "continuation solver", meaning that it can control the parameter steps taken in a way similar to a transient solver with automatic time step control. [QUOTE] This is done by adding a material Switch node, specifying the materials to switch between, and then adding a material sweep to your study. warning Sweep through and compare different materials. However recently I have noticed that when I have a much finer mesh, computation time is .This is regarding the numerical solving of the drift diffusion equations. I notice the order of sweep is parametric first, then function sweep (maybe it is the default). I'm using comsol semiconductor module to model the charge transport in a chunk of semiconductor I vary the thickness of the semiconductor and solve the model as a parametric sweep. Note that while COMSOL employees may participate in the discussion forum, COMSOL software users who are on-subscription should submit their questions via the Support Center for a more comprehensive response from the Technical Support team. Discussion Closed This discussion was created more than 6 months ago and has been closed. After this, everything will be OK. Best regards, Watch the video to see how to implement this type of parametric study using the COMSOLMultiphysics simulation software. -- It seems that "parametric sweeps" have more features and are easier to plot (you can tableplot "inner solutions" or "outer solutions") So it seems like the only reason why "auxiliary sweeps would still be included in COMSOL would be if they compute faster, or had some other benefit. I have designed reflectarray element to generate OAM beams at 5.8GHz and feeding it though Horn Antenna on HFSS. After full wave simulation, i am not getting desired results i.e Radiation pattern More Waranatha L Abeygunasekara's questions. Your Discussion has gone 30 days without a reply. I am trying to simulate similar bimorph piezoelectric harvester with below commands. BTW, the above tests are conducted with COMSOL 5.0. I checked auxiliary sweep in my stationary solution and added the parameter (which i before defined in global definitions as 1[1].) Edgar J. Kaiser It can be used to vary material property such as density, thermal conductivity, or any other material coefficient. This video uses a parametric sweep (created in a previous video, Performing a Parametric Sweep Study in COMSOL Multiphysics ) to detail the ways in which tables can be used in simulations that give multiple results. I'm interested in knowing the definition, and also how hole and electron surface recombination velocities vary this is regarding simulating solar cells using comsol semiconducting module. In addition, this feature can help you determine a material property based on experiment results. 8 Replies, Please login with a confirmed email address before reporting spam. Features include the 2D Table Surface plot type, tables, and exporting the data to other programs. It may also be that it was still the 4.2 or 4.1 version, not sure here. The auxiliary sweep however is used when material property comes into question. I am going to have 3 different probes in my qPCR work that I am going to do. Edgar J. Kaiser when it is possible to use both parametric sweep and auxiliary sweep which is better in terms of accuracy and speed? Usually, the auxiliary sweep is used when loading is too high to give unstable results, therefore, through sweep those are increased slowly . http://www.emphys.com, Hi Nils I am guessing: the sweeps over the geometry and mesh need to go on the parametric sweep; the ones over other parameters (inputs, change on boundary conditions) on the parametric solver. Review the topics in the table of contents, or browse Webinars for more great material. I need to classify the lines based on the line length. -- Applicable simulations include those with auxiliary and parametric sweeps, function and material sweeps, and time-dependent and . However, I didn't document it and just avoided the automatic setting from then when I did geometry sweeps. ), About the parametric sweep, after some tests, I found that this "parametric sweep" can be applied to any parameters, no matter geometry/mesh-related or not (input, source, etc.) I don't know if this can be generalized, but I have noticed this in What is given by the term 'surface recombination velocity" in terms of a contact? COMSOL Multiphysics(r) fan, retired, former "Senior Expert" at CSEM SA (CH), www.comsol.com/blogs/maximum-evaluations-on-parallel-sections/, Running parametric sweeps, batch sweeps, and cluster sweeps from the command line, How to Use the Cluster Sweep Node in COMSOL Multiphysics. Parametric sweep is used to perform a sweep on (change) geometric properties such as thickness, length etc. Suppose I have a parameter that I know will change neither the mesh nor the physics (magnetic fields no current and electrostatics), but only the definition of some variables in the model. I indeed had a case some time ago, when the automatic detection had not worked. Instead of manually changing these property values and re-solving each time, you can perform a parametric sweep with COMSOL Multiphysics . 10 votes 7 thanks. Please help to find the reason. when it is possible to use both parametric sweep and auxiliary sweep which is better in terms of accuracy and speed? 0 votes 0 thanks. Waranatha L Abeygunasekara. Visualize the results from a parametric sweep. Noman Iqbal. I used release rate ks=1e-6, 5e-6 and 25e-6 in parametric sweep, but all the time I get only one plot even though I select all . BITS Pilani, K K Birla Goa. Abhilash Kumar Tilak. The parametric sweep functionality, in contrast, performs an "outer sweep", meaning that it essentially solves a set of independent models. This is regarding P3HT:PCBM bulk heterojunction organic solar cells. A Material Sweep study solves your model with materials that you specify and provides you with comparative results of how those materials affect your model. That is what I did and seems to work well. Instead of manually changing these property values and re-solving each time, you can perform a parametric sweep with COMSOL Multiphysics . To start a new discussion with a link back to this one, click here. [/QUOTE] Therefore, I would like to know if it possible to combine a Parametric sweep (concerning the geometric parameters) with an auxiliary one (containing the displacement only), or if there is any other way to efficiently tackle this problem. Sweep through and solve variations of a model. Auxiliary Sweep in Submodel study in Submodelling. Sounds strange, but the parametric solver does not loop through geometry and mesh. Then you will see a "Job Configurations" node added, with a "Parametric 1" sub-node under it. As far as I have understood, the continuation solver can be used only with an Auxiliary Sweep. In this tutorial video, we will teach you how to implement a parametric sweep with the COMSOL software. Use predefined materials from software in model. And accuracy is depend on your parameter or geometry like whether it is decreasing or increasing (dependent parameter) with ur parameter changes. Thank you all for sharing useful information. Your internet explorer is in compatibility mode and may not be displaying the website correctly. Discussion Closed This discussion was created more than 6 months ago and has been closed. Cheers But when I do a parametric sweep on this parameter the solver re-does the physics each time (not the mesh thankfully), even though the parameter only effects the variables in the model, and I have parametric solver set to automatic already. In most cases you can either use auxiliary or parametric sweep to sweep the study over a certain parameter. Posted Apr 5, 2013, 4:22 a.m. EDT This is done by adding a material Switch node, specifying the materials to switch between, and then adding a material sweep to your study.

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