All rights reserved. regards, Select, add, and run a study for your model. All my attempts have failed (I have tried to put all the parameters in the auxilary sweep, setting the . The parametric solver performs an "inner sweep", which is optimized for performance in the sense that it tries to avoid reassembling and refactorizing the Jacobian or reassembling other constant vectors.
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Applicable simulations include those with auxiliary and parametric sweeps, function and material sweeps, and time-dependent and frequency-domain studies. 2)When "joining", or comparing, solutions, you will be asked to choose . Your internet explorer is in compatibility mode and may not be displaying the website correctly. Noman Iqbal. However, I didn't document it and just avoided the automatic setting from then when I did geometry sweeps. I have had a similar problem right now, in Comsol 4.4. I want to have function sweep first, then parametric sweep (I notice there might be some convergence issue on the order as I am using reuse solution from previous step). Best,
Features include the 2D Table Surface plot type, tables, and exporting the data to other programs. BTW, the above tests are conducted with COMSOL 5.0. So far I have been using the default settings. Any ideas? Your internet explorer is in compatibility mode and may not be displaying the website correctly. If any such use is detected, the parametric solver will not be used. warning
Combine material sweeps and optimization. The terminology is admittedly a bit confusing with respect to parametric sweeps and the parametric solver. The auxiliary sweep however is used when material property comes into question. Exercise . 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. But on the other hand, this makes it possible to change geometry and mesh between steps, as well as distribute steps, e.g., over nodes in a cluster. I would really like to be able to plot quantities against this parameter and have access to a drop-down menu in the results section like I would if I did a parametric sweep study. Applicable simulations include those with auxiliary and parametric sweeps, function and material sweeps, and time-dependent and . Thanks in advance Regards. [QUOTE]
Deciding which materials will perform best, subject to your design and performance requirements, is an important part of product development. 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. After running a COMSOLMultiphysics simulation that yields multiple results, there are specific ways to postprocess the data. This is done by adding a material Switch node, specifying the materials to switch between, and then adding a material sweep to your study. 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. You have reached the end of the Learning Center. Your internet explorer is in compatibility mode and may not be displaying the website correctly. 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. Auxiliary Sweep in Submodel study in Submodelling. Your Discussion has gone 30 days without a reply.
Do they? best regards
I'll do my best to stick to these from now on ;)
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. The parametric solver performs an "inner sweep", which is optimized for performance in the sense that it tries to avoid reassembling and refactorizing the Jacobian or reassembling other constant vectors. the technique explained here: http://www.comsol.com/blogs/maximum-evaluations-on-parallel-sections/ . Please help to find the reason. This is done by adding a material Switch node, specifying the materials to switch between, and then adding a material sweep to your study. Parametric sweep is used to perform a sweep on (change) geometric properties such as thickness, length etc. Sounds strange, but the parametric solver does not loop through geometry and mesh. when it is possible to use both parametric sweep and auxiliary sweep which is better in terms of accuracy and speed? [/QUOTE]
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. It also uses the previous solution as initial guess for the next parameter step, speeding up convergence of each step. 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. Use predefined materials from software in model. Instead of manually changing these property values and re-solving each time, you can perform a parametric sweep with COMSOL Multiphysics . I even get How to do Piezoelectric coupling in ANSYS-APDL or COMSOL between tapered substrate and rectangular piezoelectric patch? 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. Changing this setting should not be necessary since the "Automatic" option looks for parameters being used in geometry and mesh settings. Copyright 2022 FAQS.TIPS. In most cases you can either use auxiliary or parametric sweep to sweep the study over a certain parameter. If you do not hold an on-subscription license, you may find an answer in another Discussion or in the Knowledge Base. 8 Replies, Please login with a confirmed email address before reporting spam. The parametric sweep functionality, in contrast, performs an "outer sweep", meaning that it essentially solves a set of independent models. I have noticed that solution to my comsol model can depend on, mesh, initial guess and also on which solver is being used. I have a slab of semiconductor sandwiched between two schotkky contacts. Thank you all for sharing useful information. A parametric sweep allows you to change the parameter values through a specified range. Edgar
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. 0 votes 0 thanks. Sweep through and solve variations of a model. You can fix this by pressing 'F12' on your keyboard, Selecting 'Document Mode' and choosing 'standards' (or the latest version Sounds strange, but the parametric solver does not loop through geometry and mesh. When I tried to add a geometry parameter to a sweep already containing other parameters, I obtained the same problem than you (even turning the study extensions off). 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.
As a result, selecting and then testing different materials is oftentimes necessary. After this, everything will be OK. Originally when I add a geometry-related parameter, I got the "Parametric Sweep Parametric solver does not support parameters in geometry or mesh." . This makes it suitable for solving models in pseudo-time, such as contact and plasticity problems. Review the topics in the table of contents, or browse Webinars for more great material. Ant this time, what is created from the parametric sweep is a "Parametric 2" node just under and at the same level than the Solver 1.
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. listed if standards is not an option). when it is possible to use both parametric sweep and auxiliary sweep which is better in terms of accuracy and speed? Sweep through and compare different materials. I am trying to simulate similar bimorph piezoelectric harvester with below commands. However, if I start over and select a seep only on the geometry parameter, it works! Results of single-case research designs (i.e., n-of-1 trials) are often evaluated by visually inspecting the time-series graph and computing quantitative indices. In this case, the parametric sweep was creating a parametric solver node. Use functions to define material properties. listed if standards is not an option). This is only possible as long as the degrees of freedom stay the same; so it cannot be used when the geometry or mesh is modified. Edgar J. Kaiser
This will vary the thickness at steps of 0.1 from 1 to 10. Exercise Files I am going to have 3 different probes in my qPCR work that I am going to do. Parameters, Variables, & Functions, Studies & Solvers, Structural Mechanics Then you will see a "Job Configurations" node added, with a "Parametric 1" sub-node under it. 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. In this tutorial video, we will teach you how to implement a parametric sweep with the COMSOL software. 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. 1) Right click on 'Data Sets' in 'Results' section and click on 'Join'. Yes you can do that. Hello David,
Version 5.0 Yes you can do that. Please login with a confirmed email address before reporting spam Hello All, I am trying to run a parametric sweep under a frequency sweep study. Using a simple parametric sweep study, we show you how to tabulate your data and display it in an informative way. Just make sure to set 'use parametric solver' under the Parametric Sweep > Study Extensions to 'OFF'. Parametric Sweep. Is there any way I can change this order? As far as I have understood, the continuation solver can be used only with an Auxiliary Sweep. You can fix this by pressing 'F12' on your keyboard, Selecting 'Document Mode' and choosing 'standards' (or the latest version 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. In most cases you can either use auxiliary or parametric sweep to sweep the study over a certain parameter. Jeff. Aiman Memon. You have reached the end of the Learning Center. 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.
Instead of manually changing these property values and re-solving each time, you can perform a parametric sweep with COMSOL Multiphysics . Thanks for the clarification about the two names "Parametric Solver" and "Parametric sweep",
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 . I need to classify the lines based on the line length.
Dear Concern, Hope you are doing well. 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? After full wave simulation, i am not getting desired results i.e Radiation pattern More Waranatha L Abeygunasekara's questions. This video uses a parametric sweep (created in a previous video, Performing a Parametric Sweep Study in COMSOLMultiphysics) to detail the ways in which tables can be used in simulations that give multiple results. Your internet explorer is in compatibility mode and may not be displaying the website correctly. I would like to know how these two differ and when one is more suitable than the. I'm running COMSOL simulations in a 64GB RAM workstation. Posted Apr 5, 2013, 4:22 a.m. EDT 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. I have noticed that open circuit voltage is a little less for the annealed devices when compared to un-annealed devices.
BITS Pilani, K K Birla Goa. http://www.emphys.com, Hello,
Visualize the results from a parametric sweep. 28th Sep, 2020. 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. Watch the video to see how to implement this type . I notice the order of sweep is parametric first, then function sweep (maybe it is the default). Review the topics in the table of contents, or browse Webinars for more great material. ), 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.) A parametric sweep allows you to change the parameter values through a specified range. 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. And accuracy is depend on your parameter or geometry like whether it is decreasing or increasing (dependent parameter) with ur parameter changes. ET,10,CIRCU94,0 !SET UP RESISTOR R,1,100000 !RESISTANCE VALUE TYPE,10 !SET ELEMENT TYPE E,1,2 !CREATE RESISTOR BETWEEN NODES 1 AND 2 Dongguk University. I think when we are using auxilary or parametric sweep the term speed no where related. --
Nils Malm, Nils,
You can fix this by pressing 'F12' on your keyboard, Selecting 'Document Mode' and choosing 'standards' (or the latest version I have J-V characteristics (both dark and light) for some solar cells. Indeed this tick appear rather recently (and discretely ;)
lvaro, 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. [QUOTE]
Features include the Table Surface plot type, tables, and the ability to export the data to other programs. Use probe to reduce the accumulated data. That is what I did and seems to work well. A question our research team is Hello, good day! I indeed had a case some time ago, when the automatic detection had not worked. To start a new discussion with a link back to this one, click here. If you still need help with COMSOL and have an on-subscription license, please visit our Support Center for help. 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. The solution to this problem is to remove any existing solver configurations, and select "Show default solver" again. Best regards,
Just make sure to set 'use parametric solver' under the Parametric Sweep > Study Extensions to 'OFF'. Using a simple parametric sweep study, we show you how to tabulate your data and display it in an informative way. Having fun COMSOLing
This means that each parameter step will be more expensive to compute since degree of freedom allocation, etc, is redone separately for each step. Edgar
Our partners will collect data and use cookies for ad personalization and measurement. 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. This is regarding P3HT:PCBM bulk heterojunction organic solar cells. Posted 13 aot 2012, 00:06 UTC+2 Version 5.2, Version 5.2a 2 Replies . Learn how we and our ad partner Google, collect and use data. 17 Recommendations . In addition, this feature can help you determine a material property based on experiment results. I checked auxiliary sweep in my stationary solution and added the parameter (which i before defined in global definitions as 1[1].) Send Private Message Flag post as spam.
listed if standards is not an option). 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. Waranatha L Abeygunasekara. Switch between mold materials in results. Study / Parametric Sweeps Instead of manually changing these property values and re-solving each time, you can perform a parametric sweep with COMSOL Instead of manually changing these property values and re-solving each time, you can perform a parametric sweep with COMSOL Multiphysics . Version 5.2 When using simulation software, this means re-solving a simulation multiple times.
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