I notice the order of sweep is parametric first, then function sweep (maybe it is the default). Using a simple parametric sweep study, we show you how to tabulate your data and display it in an informative way. You can fix this by pressing 'F12' on your keyboard, Selecting 'Document Mode' and choosing 'standards' (or the latest version Hi, im trying to make a projection in a 3d comsol model. I am using a 2707 waters HPLC device. Cheers Is there any way I can change this order? I need to classify the lines based on the line length. 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). when it is possible to use both parametric sweep and auxiliary sweep which is better in terms of accuracy and speed? 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. 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. listed if standards is not an option). I am going to have 3 different probes in my qPCR work that I am going to do. Thanks in advance Regards. Combine material sweeps and optimization. When I try to inject a sample, it says missing plate or rack. In this tutorial video, we will teach you how to implement a parametric sweep with the COMSOL software. The auxiliary sweep however is used when material property comes into question. These devices are fabricated under different conditions and I would like to compare the mobility at each instance. listed if standards is not an option). In this case, the parametric sweep was creating a parametric solver node. Noman Iqbal. Features include the Table Surface plot type, tables, and the ability to export the data to other programs. Parametric Sweep - COMSOL Dongguk University. Sounds strange, but the parametric solver does not loop through geometry and mesh. You have reached the end of the Learning Center. When using simulation software, this means re-solving a simulation multiple times. 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 can be used to vary material property such as density, thermal conductivity, or any other material coefficient. It also uses the previous solution as initial guess for the next parameter step, speeding up convergence of each step. [/QUOTE] 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. Postprocessing the Results from a Parametric Sweep - COMSOL What is the difference between auxiliary sweep and parametric sweep in Send Private Message Flag post as spam. r/COMSOL - Are "Auxiliary sweeps" faster than "parametric sweeps"? (or Edgar J. Kaiser 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. The parametric sweep functionality, in contrast, performs an "outer sweep", meaning that it essentially solves a set of independent models. 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. A parametric sweep allows you to change the parameter values through a specified range. Parameters, Variables, & Functions, Studies & Solvers, Structural Mechanics I even get How to do Piezoelectric coupling in ANSYS-APDL or COMSOL between tapered substrate and rectangular piezoelectric patch? Yes you can do that. I am trying to simulate similar bimorph piezoelectric harvester with below commands. parametric sweep - COMSOL Multiphysics auxiliary sweep - comsol.de I have J-V characteristics (both dark and light) for some solar cells. Learn how we and our ad partner Google, collect and use data. Waranatha L Abeygunasekara. I have had a similar problem right now, in Comsol 4.4. Use the same materials for multiple components. However, if I start over and select a seep only on the geometry parameter, it works! This means that each parameter step will be more expensive to compute since degree of freedom allocation, etc, is redone separately for each step. Hello David, 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. Just make sure to set 'use parametric solver' under the Parametric Sweep > Study Extensions to 'OFF'. How to Perform Parametric Sweeps - comsol.it The model will be solved again and again for any combinations of parameters you define. A question our research team is Hello, good day! Deciding which materials will perform best, subject to your design and performance requirements, is an important part of product development. listed if standards is not an option). 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. As a result, selecting and then testing different materials is oftentimes necessary. Switch between mold materials in results. In most cases you can either use auxiliary or parametric sweep to sweep the study over a certain parameter. Usually, the auxiliary sweep is used when loading is too high to give unstable results, therefore, through sweep those are increased slowly . 0 Replies, Please login with a confirmed email address before reporting spam. 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. If any such use is detected, the parametric solver will not be used. Sweep through and solve variations of a model. Version 5.0 You can add a second study with an auxiliary sweep in which you solve no equation at all, i.e. -- Instead of manually changing these property values and re-solving each time, you can perform a parametric sweep with COMSOL Multiphysics . Good luck. 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. Copyright 2022 FAQS.TIPS. Edgar Our partners will collect data and use cookies for ad personalization and measurement. Indeed this tick appear rather recently (and discretely ;) I indeed had a case some time ago, when the automatic detection had not worked. Your internet explorer is in compatibility mode and may not be displaying the website correctly. If you find a case where this automatic detection does not work, please report it to COMSOL support. http://www.emphys.com, Hello, Parametric sweep is used to perform a sweep on (change) geometric properties such as thickness, length etc. 0 votes 0 thanks. 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. -- Postprocessing Parametric Sweep Results - COMSOL Select, add, and run a study for your model. 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. Send Private Message Flag post as spam. This will vary the thickness at steps of 0.1 from 1 to 10. What is the difference between auxiliary sweep and parametric sweep in 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. A parametric sweep allows you to change the parameter values through a specified range. You can fix this by pressing 'F12' on your keyboard, Selecting 'Document Mode' and choosing 'standards' (or the latest version The solution to this problem is to remove any existing solver configurations, and select "Show default solver" again. Sounds strange, but the parametric solver does not loop through geometry and mesh. 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 am working on an implantable drug delivery system. How can I sum the solution(s) of a comsol study over a parametric sweep 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. To start a new discussion with a link back to this one, click here. Visualize the results from a parametric sweep. Best, I'm running COMSOL simulations in a 64GB RAM workstation. Watch the video to see how to implement this type of parametric study using the COMSOLMultiphysics simulation software. Watch the video to see how to implement this type . BITS Pilani, K K Birla Goa. And accuracy is depend on your parameter or geometry like whether it is decreasing or increasing (dependent parameter) with ur parameter changes. I have a slab of semiconductor sandwiched between two schotkky contacts. 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 This is done by adding a material Switch node, specifying the materials to switch between, and then adding a material sweep to your study. Version 5.2 For example, if you want to monitor stress on a film as thickness increases, instead of changing the thickness every time for each simulation, use a parametric sweep i.e range(1,0.1,10). 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. Exercise . However, the output power doesn't change with resistor value. Ivar, Hello, 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. To start a new discussion with a link back to this one, click here. 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. Thanks for the clarification about the two names "Parametric Solver" and "Parametric sweep", 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. COMSOL AB. Posted 14 feb 2022, 17:00 CET Version 5.3a 2 Replies. 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. How to Perform Parametric Sweeps - COMSOL Combining parametric and auxiliary sweep - COMSOL Multiphysics Abhilash Kumar Tilak. Edgar 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. Features include the 2D Table Surface plot type, tables, and exporting the data to other programs. Sweep through and compare different materials. After running a COMSOL Multiphysics simulation that yields multiple results, there are specific ways to postprocess the data. the technique explained here: http://www.comsol.com/blogs/maximum-evaluations-on-parallel-sections/ . After full wave simulation, i am not getting desired results i.e Radiation pattern More Waranatha L Abeygunasekara's questions. http://www.emphys.com, Hi Nils 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. Posted 13 aot 2012, 00:06 UTC+2 Version 5.2, Version 5.2a 2 Replies . Jeff. Posted Feb 29, 2016, 4:58 a.m. EST Combining parametric and auxiliary sweep - comsol.de You have reached the end of the Learning Center. ), 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.) Your internet explorer is in compatibility mode and may not be displaying the website correctly. listed if standards is not an option). We will continuously update the Learning Center with new topics and materials, so be sure to check back often! Aiman Memon. You can fix this by pressing 'F12' on your keyboard, Selecting 'Document Mode' and choosing 'standards' (or the latest version Your Discussion has gone 30 days without a reply. Study / Parametric Sweeps Instead of manually changing these property values and re-solving each time, you can perform a parametric sweep with COMSOL I checked auxiliary sweep in my stationary solution and added the parameter (which i before defined in global definitions as 1[1].) I have noticed that open circuit voltage is a little less for the annealed devices when compared to un-annealed devices. 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. order of parametric and function sweep - COMSOL It also uses the previous solution as initial guess for the next parameter step, speeding up convergence of each step. 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. Define your own custom material from scratch. Sankha Mukherjee . Frequency Sweep and Parametric Sweep. 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. 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? If you still need help with COMSOL and have an on-subscription license, please visit our Support Center for help. This is done by adding a material Switch node, specifying the materials to switch between, and then adding a material sweep to your study. 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 . Your internet explorer is in compatibility mode and may not be displaying the website correctly. 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. Auxiliary Sweep in Submodel study in Submodelling. It is very useful. 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. Posted Apr 5, 2013, 4:22 a.m. EDT Exercise . 2)When "joining", or comparing, solutions, you will be asked to choose . 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). 17 Recommendations . 1) Right click on 'Data Sets' in 'Results' section and click on 'Join'. Use predefined materials from software in model. Performing Material Sweeps in COMSOL [/QUOTE] In addition, this feature can help you determine a material property based on experiment results. COMSOL auxiliary sweep? | ResearchGate
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