A parametric sweep allows you to change the parameter values through a specified range. I want to use these values in a comsol optimization solver. Instead of manually changing these property values and re-solving each time, you can perform a parametric sweep with COMSOL Multiphysics ®. Combining parametric and auxiliary sweep. Combining parametric and auxiliary sweep. The first step is to define a scalar that we can use in a relational or logical expression. However, I can't find a way to save the individual solutions from the auxiliary sweep. I checked auxiliary sweep in my stationary solution and added the parameter (which i before defined in global definitions as 1[1].) Learn how to import results data into COMSOL Multiphysics® by watching this video in the Learning Center. This video is all about Parametric Sweep in COMSOL Multiphysics It can be a unit load or the intended operating load. If you still need help with COMSOL and have an on-subscription license, please visit our Support Center for help. --. If you click on a study step, you will see on its settings window a section “Study Extensions”. The usage and the configuration of a Cluster Sweep node is described in the blog post How to use the Cluster Sweep Node in COMSOL Multiphysics®. NOTE: A Floating Network License (FNL) is required to run COMSOL Multiphysics® in distributed memory parallel mode. This video demonstrates these topics using a model containing an auxiliary sweep. Here is a simple tutorial on how to use parametric sweep in COMSOL Multiphysics 5.2 normally a Parametric Sweep comes before your frequency domain, if not you can run an Study extension auxiliary sweep (in v4.3, not sure for versions before), but then you must sort the results accordingly. I want to use these values in a comsol optimization solver. - … Simulations involving parametric sweeps, function and material sweeps, and time-dependent and frequency-domain studies are also applicable. 2020 г., 01:36 GMT-5 Electrochemical Engineering Version 5.5 0 Replies . The first step is to define a scalar that we can use in a relational or logical expression. Posted 29 февр. THen you have the external Parametric sweep if you want also to change the geoemtry with a sweep parameter. Send Private Message Flag post as spam. 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 have had a similar problem right now, in Comsol 4.4. using of auxiliary sweep to increase voltage in electrodialysis cell. 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). If you run an auxiliary sweep, you can also check the Distribute parametric solver option in the study step, for example, to run a frequency sweep over many frequencies in parallel using multiple processes on potentially many physical nodes. For stationary models with an Auxiliary Sweep over a ramping parameter, the default behavior is to use the Continuation method. The COMSOL discussion forum covers a wide variety of simulation topics. 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. Applicable simulations include those with auxiliary and parametric sweeps, function and material sweeps, and time-dependent and frequency domain studies. This means that analytical solutions can be challenging to nd. The study consists of two study steps: A Stationary study step where the stress state from the applied load is computed. In COMSOL Multiphysics, a stop condition can be added to the following solvers: Time-dependent solver. Hi. On clusters, you can use the Distribute parametric solver option, which is very efficient for problems that fit into a single node for each parameter value. Posted: 1 decade ago. Posted: 1 decade ago. piezoelectric prestressed frequency auxiliary sweep strange result. Browse the threads and share your ideas with the COMSOL community. Experimental measurements using the commercial sensor and steel samples during cooling were carried out to validate the modelling approach, with excellent agreement being obtained for the sensor signal at different frequencies. Generally speaking, biological systems of interest have interesting geometries and we are interested in things happening in time and space. comsol batch -inputfile mymodel.mph -outputfile out.mph -study std1. Zhengyu Shi . The auxiliary sweep will find a solution for the first value of “visc_ramp” (1000) and use this solution as the initial condition for solving the next value of “visc_ramp” (100). Posted 10 мар. 2015 г., 04:10 GMT-4 Structural Mechanics & Thermal Stresses Version 5.0 0 Replies . Browse the threads and share your ideas with the COMSOL community. 31.01.2011, 01:15 GMT-5. Exercise Files. Report. Posted: 4 years ago . Note that while COMSOL employees may participate in the discussion forum, ... Auxiliary dependent variable read 1 Replies 1985 Views. Posted 25 May 2021, 05:36 GMT-7 AC/DC & Electromagnetics Version 5.6 1 Reply . Please login with a confirmed email address before reporting spam. Using a auxiliary sweep I evaluate a 3D solid mechanics model for subsequent prescribed deformations. In this case, the parametric sweep was creating a parametric solver node. The Hall effect sensor is commonly used for position sensing. I checked auxiliary sweep in my stationary solution and added the parameter (which i before defined in global definitions as 1 [1].) I chose Specified combinations, gave a range of 4 steps and chose run continuation for last parameter (but it is the same for no parameter and then reuse solution yes) An auxiliary sweep was also used in the study to help model convergence at low frequency. Kapitelauswahl. Resources and documents are provided for your information only, and COMSOL makes no explicit or implied claims to their validity. Please login with a confirmed email address before reporting spam . If plasticity is needed, we want to do the auxiliary sweep in steps of 0.05. Hi. Overview; Transcript; Application Files ; Share: After running a COMSOL Multiphysics simulation that yields multiple results, there are specific ways to postprocess the data. Blighty . This video demonstrates these topics using a model containing an auxiliary sweep. Electrical AC/DC & Electromagnetics Particle Tracing Particle Tracing Parameters, Variables, & Functions Santiago Villavicencio posted 6 years ago. Butterbrot Electrical Engineering. 12-Aug-2012, 11:12 pm GMT-7. 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. Posted 29.02.2016, 01:58 GMT-8 Parameters, Variables, & Functions, Studies & Solvers, Structural Mechanics & Thermal Stresses Version 5.2 0 Replies . I have included the solid mechanics and electrostatic physics to solve for a stationary study. normally a Parametric Sweep comes before your frequency domain, if not you can run an Study extension auxiliary sweep (in v4.3, not sure for versions before), but then you must sort the results accordingly--Good luck Ivar . Send Private Message Flag post as spam. Frequency-domain solver. To help the convergence of a stationary model with a varying stress-dependent elastic modulus, I am using an auxiliary sweep instead of parametric sweep. comsol batch -nn 4 -nnhost 4 -inputfile mymodel.mph -outputfile out.mph -study std1. Instead of manually changing these property values and re-solving each time, you can perform a parametric sweep with COMSOL Multiphysics ®. Select the Auxiliary sweep check box to enable an auxiliary parameter sweep, which corresponds to a Parametric solver attribute node. To find the optimal properties for a product's design, it is sometimes required to test variations of these parameters. Please login with a confirmed email address before reporting spam. THen you have the external Parametric sweep if you want also to change the geoemtry with a sweep parameter. Anywhere in that auxiliary sweep I expect a maximum and minimum value of the results I am interested in (total energy, center of mass, etc.). Alberto Ferrero . An auxiliary sweep has enabled us to solve for multiple Reynolds numbers while improving the convergence of the simulation. Exercise Files . … We have also demonstrated how you can leverage mapped meshing to efficiently discretize a four-sided geometry and better resolve the high gradients in the flow near the walls. The Auxiliary sweep uses a more efficient algorithm for varying the parameters, as compared to the Parametric Sweep, and reduces solution time and storage when applicable. Send Private Message Flag post as spam. Hi! On clusters, you can use the Distribute parametric solver option, which is very efficient for problems that fit into a single node for each parameter value. Browse the threads and share your ideas with the COMSOL community. Showing visually engaging animations can be extremely valuable when conveying the results of your COMSOL Multiphysics ® model. Send Private Message Flag post as spam. Hi I have a stationary solid mechanics model that involves large displacements and uses hyper-elastic materials etc. Chapter Selection. Solved with COMSOL Multiphysics 5.1 3 | COOLING AND SOLIDIFICATION OF METAL The melting temperature, T m, and enthalpy, H , are 1356 K and 205 kJ/kg, respectively. When you do a regular parametric sweep, COMSOL solves the problem for each parameter from scratch. The sweep continues in such a way until “visc_ramp” reaches a value of 1, which means that we are solving for the actual fluid viscosity. Posted 14 нояб. Posted 2 lug 2020, 01:35 GMT-7 Piezoelectric Devices, Mechanical Version 5.3a 0 Replies . by Walter Frei. ... using of auxiliary sweep to increase voltage in electrodialysis cell read 0 Replies 33 Views. --. you have the internal parametric sweep see the solver node page : "Continuation" tab (hidden by default).
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