Comsol parametric range

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Comsol parametric range

In version 5. New and updated solvers speed up a wide range of simulations. Two new add-on products, the Porous Media Flow Module and the Metal Processing Module, further expand the product suite's multiphysics modeling power.

The Design Module provides a new sketching tool that makes it easy to assign dimensions and constraints to planar drawings for 2D models and 3D work planes. Ultrasound technology is becoming increasingly important in a wide range of applications spanning from process engineering and nondestructive testing to consumer electronics.

The method also has low frequency applications, such as in seismology. The included multiphysics capabilities can seamlessly combine linear elastic wave propagation in a solid and its transition to a fluid as an acoustic pressure wave, and back again.

The fluid-structure acoustics coupling is available in the Acoustics Module. For frequency-domain simulations, a specialized solver for wave propagation analysis makes it possible to handle higher frequencies shorter wavelengths using the finite element method.

The new solver can be used to analyze enclosed structures such as that of a car cabin interior as well as other acoustics simulations. The new Metal Processing Module makes metal phase transformation analysis accessible within the COMSOL Multiphysics environment for applications within welding, heat treatment, and metal additive manufacturing.

The Porous Media Flow Module gives users within, for example, food, pharmaceutical, and biomedical industries a wide range of transport analysis capabilities for porous media.

The flow models cover linear and nonlinear flow in saturated and variably saturated media with special options for slow and fast porous media flows. A new smoothing operation for topology optimization ensures higher-quality geometry outputs that can be used for additional analysis and additive manufacturing. For users of the Structural Mechanics Module, a new user interface for pipe mechanics provides functionality to perform stress analysis of pipe systems.

This allows users to include loads that are random in nature, such as turbulent wind gusts or road-induced vibrations on a vehicle. The loads can be fully correlated, uncorrelated, or have a specific user-given correlation. The Multibody Dynamics Module provides new functionality for analyzing rigid and elastic chain drives with automatic generation of the large number of links and joints needed for modeling chain drives. In addition, the flow interfaces for rotating machinery now support the level set and phase field methods as well as Euler—Euler and bubbly flow.

The Heat Transfer Module comes with a new interface for lumped thermal systems, an equivalent circuit modeling approach for heat transfer simulations. Radiation in semitransparent participating media now supports multiple spectral bands, and a new open boundary formulation for convective flow reduces solution time by 30 percent.

This enables multiscale modeling, such as analyzing a waveguide beaming into a large room, where using a full-wave simulation would be computationally prohibitive. In the RF Module, a set of new ports for vias and transmission lines makes setup much quicker and gives more control to the user for modeling of printed circuit boards.

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Powerful Parametric Sketching with Dimensions The Design Module provides a new sketching tool that makes it easy to assign dimensions and constraints to planar drawings for 2D models and 3D work planes. Highlights in Version 5. Report Abusive Comment. Digital Edition.This website uses cookies to function and to improve your experience. By continuing to use our site, you agree to our use of cookies.

Discussion Closed This discussion was created more than 6 months ago and has been closed. To start a new discussion with a link back to this one, click here. You can fix this by pressing 'F12' on your keyboard, Selecting 'Document Mode' and choosing 'standards' or the latest version listed if standards is not an option. Log Out Log In Contact.

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OK Learn More. Discussion Forum. Forum Home. New Discussion. How to 'continue' a parametric sweep in case of a problem? Send Private Message Flag post as spam. Please login with a confirmed email address before reporting spam.

Send a report to the moderators. Hello, I have a parametric sweep. Sometimes the simulation fails at one of these values, and the sweep stops. If I fix the problem and I do not want to reprocess those parameter values which succeeded, how can I run the simulation for only the remaining parameters, and accumulate the results so that finally I have the complete set of solutions? Thank you Daniel.

Hi Daniel, since the solution to your question appears to be not be well-known in the community, I take the opportunity to comment on it. The solver will return all others and report the error for 0.

I hope this will help you. Best regards, Sven Friedel. Attachments: screenshot. Dear Sven, Perfect, thank you.

Running parametric sweeps, batch sweeps, and cluster sweeps from the command line

If I decide later to add one more parameter value to the sweep, can I run the simulation only for that particular value, and append the solution to the parametric solution? Dear Daniel, no, I do not think this is possible in the current version, you would need to start a new parametric sweep. Sven Friedel. I am trying to implement this solution in version 5. Was this feature removed in the software update?

Is it not available on the Linux platform? Is the feature now activated under a different node? Any help would be greatly appreciated.Diese Website verwendet Cookies, um einwandfrei zu funktionieren und Ihr Erlebnis zu verbessern. You have reached the end of the Learning Center.

Solution number is out of range

Review the topics in the table of contentsor browse Webinars for more great material. We will continuously update the Learning Center with new topics and materials, so be sure to check back often! In product development, it is often necessary to solve several variations of a model to find its design's optimal properties. 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 listed if standards is not an option.

Produkte Videogalerie Webinare Blog Support. Abmelden Anmelden Kontakt. OK Mehr erfahren. Repeat Parametric Sweeps. Play Postprocess Sweep Results. Duration: In product development, it is often necessary to solve several variations of a model to find its design's optimal properties.

How to Postprocess Results with Multiple Parameters

Basics of Studies Select, add, and run a study for your model. Parametric Sweeps Sweep through and solve variations of a model. Postprocess Sweep Results Visualize the results from a parametric sweep. Explore Learning Center.Discussion Closed This discussion was created more than 6 months ago and has been closed.

To start a new discussion with a link back to this one, click here.

comsol parametric range

Posted 18 juil. You can fix this by pressing 'F12' on your keyboard, Selecting 'Document Mode' and choosing 'standards' or the latest version listed if standards is not an option. OK En savoir plus. Discussion Forum. Forum Home. New Discussion. Send Private Message Flag post as spam. Please login with a confirmed email address before reporting spam. Send a report to the moderators. But when I try to change one of them from the default value, sometimes the results are not reasonable.

What do you think about this? Posted: 10 years ago 19 juil. Hi There are a few other threads about that, do a searxh on the Forum, personally I have given up following the index numbering when the topology changes for complex geometries -- Good luck Ivar. Hi Ivar, thanks for the answer. At first glance I couldn't get any help from the previous threads. Comsol seems to scan my geometry, when completed, and sort the objects from left to right.

I wonder if it is possible to let Comsol use an alternative criterium for indexing all geometry objects: in this case it would be helpful to sort the regions following the order from the first to the last defined object.

Maybe in Comsol4 it is possible?This website uses cookies to function and to improve your experience. By continuing to use our site, you agree to our use of cookies. Model methods are presented as a concept to modify Parametric SweepBatch Sweepand Cluster Sweep nodes by, for example reading parameter cases from files.

The -mode desktop option can be used to run Batch Sweep and Cluster Sweep nodes from the command line and to obtain synchronized solutions and synchronized accumulated probe tables in the output file. The Parametric Sweep node is controlling the parameter ranges of the corresponding parametric study. The solutions in the study are either available as parametric values in the solution sequence if the Parametric Solver is usedor under a Parametric Solutions node if an outer sweep with an additional Parametric Sweep node under Job Configurations is used; see the figure below.

If the Parametric Sweep study is run in a distributed memory parallel environment. With this option enabled, the parameter cases of the Parametric Sweep are distributed across the running compute processes. When running, for example four parameter cases on two nodes, each node will handle two parameter cases and the nodes are accomplishing their work simultaneously. These jobs are running independently of each other and in case of a failure in one job, the other jobs and their results are not affected.

The results are stored in the corresponding output files. In addition, there are options to Synchronize solutions and to Synchronize accumulated probe table in the Batch Settings section of the Batch Sweep node.

With the Synchronize solutions option, the parametric solutions of all jobs will be available in the model in the GUI for postprocessing. Batch Sweeps automatically adjust the number of cores used to an optimal value, but you can also set the resources for the jobs manually. If an external job should use only a subset of the available cores, you can set the Number of cores per job can be set on the Batch node under Job Configurations; see the figure below and the Number of simultaneous jobs can be set on the Batch Sweep node.

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The product of these two values should not exceed the number of available cores. A Cluster Sweep provides the same functionality as a Batch Sweep plus interfaces for cluster computing settings and remote and cloud access.

You can configure the external jobs for distributed execution in a cluster environment. The options Synchronize solutions and Synchronize accumulated probe tables are available in the Batch Settings section of the Cluster Sweep node as well.

comsol parametric range

A study containing a Parametric Sweep node can be run from the command line, for example by invoking. In both cases, the Parametric Sweep is running as is; that is, it runs with the parameter values stored in the Parametric Sweep node in the model.

If you want to prescribe the set of parameters for a sweep from the command line, you can instead disable the Parametric Sweep node in the model file and use the flags -pname and -plist to set the parameters by command-line input or you can read the parameters from a file using the -paramfile flag.

If you use these command-line approaches, a different output file is generated for each parameter case and the solutions are not synchronized to a single file.

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An example application from the application library with a Parametric Sweep is the Tuning Fork. This model determines the fundamental resonant frequency of a tuning fork where the prong length L is varied in the parametric sweep. You can call this model having the Parametric Sweep disabled in the GUI from the command line for a given parameter range by invoking, for example. For a space-separated parameter file paramfile. Another option for controlling a Parametric Sweep from the command line is to use a model method for reading the desired parameters from an input file.

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In the following example, the model method reads the input file and extracts the parameter names, the parameter values, and the parameter units. The extracted values are used to set the corresponding properties on the Parametric Sweep node. Finally, the Parametric Sweep is done by running the Parametric Sweep subnode under Job Configurations assuming this node has been created before, for example by running the study in the GUI.

The following example code can be used to define a new model method in the Application Builder:. In the Model Builder you can add a method call to the previously defined model method under Global Definitions by selecting Add Method Call on the Developer tab. You can test the model method by right-clicking the Modelmethod1 node and selecting Run. The parameter file pfile. With this configuration the Parametric Sweep can be run from the command line by calling the model method.

The parameters in the sweep are those defined in the parameter file loaded by the model method.We use cookies to offer you a better experience, personalize content, tailor advertising, provide social media features, and better understand the use of our services.

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For further information, including about cookie settings, please read our Cookie Policy. By continuing to use this site, you consent to the use of cookies. We value your privacy. Asked 1st Jan, Waranatha L Abeygunasekara. 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.

Thank you. Comsol Multiphysics. High Performance Computing. Most recent answer. Owino A. Kyungpook National University. Parametric sweep is used to perform a sweep on change geometric properties such as thickness, length etc. 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.

This will vary the thickness at steps of 0. The auxiliary sweep however is used when material property comes into question. It can be used to vary material property such as density, thermal conductivity, or any other material coefficient. In addition, this feature can help you determine a material property based on experiment results.

Good luck. Popular Answers 1. 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.Questo sito web utilizza i cookie per rendere efficienti i nostri servizi e per migliorare la tua esperienza di navigazione. Continuando a usare il sito, accetti il loro utilizzo.

You compute a distributed parametric sweep on a cluster. When processing the results some values are missing or you get errors such as "The solution number is invalid" or "Solution number is out of range".

The update is also available for manual download in the Product Update page. In some cases you can avoid the problem by changing the Keep solutions in memory option in the Parametric Sweep settings to Only last. In that case, use probes to probe the data you need and enable the Accumulated probe table to activate the accumulation of probe updates for the variation on the solver level and on the parametric sweep level.

Another option is to enable the Save each solution as model file. It will store the result of each parameter tuple in a separate file that you can later open for postprocessing.

If you need all data for postprocessing you can use the Cluster Sweep functionality instead of the distributed Parametric Sweep. Set the Number of nodes to 1 and enable the option Synchronize solutions under Batch Settings.

You will also have to set up cluster computing settings.

COMSOL Launches Version 5.5 of COMSOL Multiphysics®

The same settings apply to the Cluster Sweep node. If you are running COMSOL Multiphysics on a cluster and you have a Parametric Sweep in your model you typically select the Distribute parametric sweep check box in order to distribute the parameters of the sweep across the nodes.

The set of parameters and parameter tuples gets distributed across the compute nodes and every compute node is processing a single parameter value or tuple or a set of parameter values or tuples. The resources cores assigned to this compute process are used when solving. Several parameters are solved in parallel by the compute nodes of the parallel job. If you are using a Cluster Sweep node, a designated cluster job will be launched for every parameter or parameter tuple specified in the parameter list in the Study Settings section of the Cluster Sweep node.

comsol parametric range

This configuration can also be beneficial in those cases where some parameter values are expected to give failures. If the cluster jobs are not managed by an external scheduler e. If the work per parameter value or tuple is small, you can consider to run a fewer total number of cluster jobs by handling multiple parameters or parameter tuples by each cluster job.

This reduces the overhead caused by starting a lot of cluster jobs.

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In this case you need to set up a nested Cluster Sweep and Parametric Sweep with an additional parameter in the Cluster Sweep that controls the offset or the parameterization of the parameter list handled by the nondistributed Parametric Sweep. The Cluster Sweep compares to a Batch Sweep with additional settings for distributed computations.


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