Optimisation in comsol

• Optimisation in comsol. In multiphysics modeling, it is often desirable to let control variables parameterize the problem and seek to optimize a function of the PDE solution. For that, we leave Study 2 containing the optimization as is. mph. 1). A Mar 29, 2018 · To learn more about parameter estimation in COMSOL Multiphysics, its use cases, and the various study step settings, read the chapters on parameter estimation in both the Introduction to the Optimization Module and Optimization Module User’s Guide documentation. The focus is on the optimization procedure, which involves choice of objective function, and optimization solver settings. 5 m. By default, the Maximum number of inner iterations per outer iteration is 10. Follow along in the software as we demonstrate how to adjust the current and utilize the Moving Mesh functionality to adjust the coil position. The resulting 3D geometry (shown below on the right) is a cube with a horizontal cylinder Using shape optimization in your models can result in a number of advantages that aren't possible when using standard parametric models. bracket_topology_optimization_stl_geom_sequence. Create the geometry. ”. For users of the Optimization Module, COMSOL Multiphysics ® version 6. Optimization. “It [optimization] used to be only for PhDs. Dec 3, 2014 · Investigating LED Efficiency via Multiphysics Simulation. 5 for the entire domain, and during the optimization process the domain will preferably Application ID: 93801. 3 of the COMSOL Multiphysics® software offers several new tools for doing so. Combining a LiveLink product together with the Optimization Module makes it possible to optimize model dimensions directly in the CAD program. These include options for combining two solutions into one; storing solutions in different data sets so that they can be postprocessed and analyzed individually; and joining solutions Application ID: 44501. Find an onsite event near you or watch online. Initially, one might choose a value of 0. Browse the COMSOL Learning Center for self-paced courses and articles. by Matt Pooley. When designing electromagnetic coils, we may want to adjust the position of the coils to achieve a desired magnetic field strength within a particular region of space. For the sake of simplicity, the far-field sound pressure level is maximized for a narrow frequency band and in a single direction. The optimisation is performed for two material types, expressed simply as fluid-solid thermal conductivity ratios (Kf/Ks=0. In this 18-minute archived webinar, you will get an introduction to using the Optimization Module for performing a parameter estimation in your model. e. May 6, 2021. COMSOL ANWENDERKONFERENZ 2006 optimization procedure significantly. Submit feedback about this page Apr 18, 2019 · Lange said he has already implemented fluid flow into the parametric optimization study, and that it is in progress for the topology optimization, which is a bit more complex. Learn how to use the COMSOL Multiphysics® software at a guided training course, webinar, or COMSOL Day. The feature is designed to be used as a density method ( Ref. The resultant device capacitance is 100 pF and the thickness of the dielectrics is D 1 = 0. Application Builder. The second post will focus on the shape optimization of RF applications. In the Geometry toolbar, click Build All. This example shows how to use the Optimization Module to find a coil geometry giving a uniform magnetic field on axis and minimal field near the axis ends. Learn how to use the Optimization Module, an add-on product to COMSOL Multiphysics®, for various optimization problems in this comprehensive PDF document. Browse to the model’s Application Libraries folder and double-click the file. Application ID: 69891. With the COMSOL Multiphysics® software, you can create geometries from topology optimization results plots for further analysis and Nov 22, 2022 · We will go over the shape optimization features in the COMSOL Multiphysics ® software and show what you can expect to achieve when these features are used for wave optics applications. In recent years, COMSOL has evolved its Optimization Module to a point where it is now possible to apply the academical learnings in the industry. Jun 4, 2019 · Using parameters to set up and control your models is definitely one of the most powerful and easy-to-use features of the COMSOL Multiphysics® software. The Optimization Module, as of COMSOL Multiphysics version 5. When you add an Optimization study node to a study, it is always inserted as the first node, at the top of the study sequence (below any parametric sweeps). GEOMETRY 1. Application ID: 12677. COMSOL Multiphysics ® supports both optimization types listed here, but this blog post will focus on gradient-based optimization. 0 brings a Transformation feature for setting up simple shape variations, revamped parameter estimation functionality for least-squares objective analyses, improved support for transient optimization, and more easily accessible optimization features. The density feature for topology optimization is used together with a parametric sweep where each optimized solution is used as input for a further improved optimization. The Optimization Module in COMSOL Multiphysics is a useful tool for addressing such problems. There are three optimization algorithms for gradient-b ased optimization available in the module. In this blog post, we discuss how the app can be used for production applications and how you can benefit from using the Application Builder to Time-Dependent Optimization. The model solves much faster using Topology optimization always involves the use of gradient-based optimization, which can be performed automatically using the COMSOL Multiphysics ® software. Simulation Apps. A more detailed description of the phenomenon and the modeling process can be seen in the blog post "Designing New Structures with Shape Optimization". OPTIMIZATION ALGORITHMS There are three optimization algorithms for gradient-based optimization available in the Optimization Module. The Optimization interface and Optimization study step in COMSOL Multiphysics® are useful for solving design problems as well as inverse problems and parameter estimation. If you want to update your model geometry without the computational requirements of remeshing, shape optimization may be a useful tool in your finite element modeling (FEM) and design process. In the following examples, the objective is to maximize the minimum eigenfrequency This model shows how to apply boundary shape optimization to an axisymmetric horn. 001 & Kf/Ks=0. Topology optimization helps engineers design applications in an optimized manner with respect to certain a priori objectives. An archived webinar on parameter estimation is also available. We will simulate radiated fields using two different techniques and verify our results Petzval Lens Optimization. The final simulation needs to include enough detail to accurately represent our design, while excluding elements that needlessly increase the computational cost. Mainly used in structural mechanics, topology May 10, 2017 · May 10, 2017. You will see several examples of how to perform shape Mar 30, 2018 · In the Optimization node, we can define the settings needed for the optimization. Topology optimization is technique where a certain optimization domain is defined, and within this domain a single design variable can take on values between 0 and 1 continuously. A first optimization is used to find the design of a nonlinear iron pole piece and top plate that maximize the BL factor at the resting position (small displacements), while constraining the amount of iron used. This is possible to do within the COMSOL Multiphysics® software by using the add-on AC/DC Module and Optimization Module to combine parameter and shape optimization. Use of an additional study to create nested studies. The dimensions of the beam region — 6 meters by 1 meter by 0. May 24, 2019 · Using COMSOL Multiphysics and a combination of the Acoustics Module and the Optimization Module, the research team was able to implement their optimization scheme with key variables and parameters, including the “pamping” function mentioned previously. Read the related paper from the COMSOL Conference 2018 Lausanne: “Numerical Optimization of Active Heat Sinks Considering Restrictions of Selective Laser Using shape optimization in your models can result in a number of advantages that aren't possible when using standard parametric models. This brief, previously held webinar explains general optimization and introduces the shape optimization capabilities in COMSOL Multiphysics ®. This model example illustrates applications of this type that would nominally be built using the following products: PDE-Constrained Optimization. Want to learn how to optimize a topology in COMSOL Multiphysics ®? Watch this archived webinar on how to build a model that solves a 2D structural topology optimization problem. In the Geometry toolbar, click Insert Sequence. However, with increasing model complexity, more and more parameters are usually introduced. Today, guest blogger René Christensen of GN Hearing discusses including thermoviscous losses in the topology optimization of microacoustic devices. We discuss the Density Model tool in the Optimization Module, how to apply topology optimization to microfluidics and acoustics scenarios, and how to export Mar 30, 2018 · In the Optimization node, we can define the settings needed for the optimization. 2) and about two hours Jan 12, 2017 · 2 Methods for Simulating Radiated Fields in COMSOL Multiphysics®. 4, the add-on Optimization Module includes a density topology feature to improve the usability of topology optimization. Model Manager. Optimizing a High-Frequency Loudspeaker Tweeter. In this follow-up blog post, learn about physics-controlled meshing, adaptive mesh refinement, and how to use a variety of meshing tools in the COMSOL Multiphysics® software for your fluid flow simulations. Next Step. To create a parametric curve, in the Geometry toolbar, from the More Primitives (3D or 2D ) menu, select Windows. Submit feedback about this page Application ID: 43511. Learn how to optimize a coil to achieve a desired B-field using COMSOL Multiphysics ® and the Optimization Module in Part 15 of the Introduction to Coil Modeling course. The optimization is motivated by the replacement of one of the glasses in a prior optical prescription with a new glass having slightly different optical dispersion coefficients. To keep our antenna modeling process efficient and accurate, we should start with a simple geometry and then gradually add more complex features. In this archived webinar, we demonstrate how to use the shape optimization capabilities of COMSOL Multiphysics®, such as analytic gradient May 6, 2021 · New Method for Performing Topology Optimization of FSI Problems. We will go over the shape optimization features in the COMSOL Multiphysics ® software and show what you can expect to achieve when these features are used for wave optics applications. December 3, 2014. When developing systems that involve fluid–structure interaction (FSI), such as bridges, aircraft, and biomedical applications, engineers may want to use topology optimization early on in the design process. In Part 2 of our blog series on multiscale modeling in high-frequency electromagnetics, we discuss a practical implementation of multiscale techniques in the COMSOL Multiphysics® software. Both ends rest on rollers while an In COMSOL Multiphysics ®, this optimization method is compatible with any type of physics phenomena as well as arbitrary multiphysics combinations. Both the SNOPT and MMA methods use the analytically computed sensitivities, but SNOPT converges the fastest to within the default tolerance of 1E-6. COMSOL Compiler™. The COMSOL Optimization Module includes both gradient-based and gradient-free optimization techniques. To simplify this step, insert a prepared geometry sequence. However, many topology optimization Jan 4, 2019 · As of COMSOL Multiphysics® software version 5. Equation-based modeling. You will find an introduction to optimization theory, examples of optimization studies, and tips and tricks for setting up and solving your own models. 5 meters — means an original total weight of 23,550 kg. You will see several examples of how to perform shape Model Definition. Sep 23, 2015 · While topology optimization may have initially been built for a mechanical design, the penalization method can also be applied to a large range of physics-based analyses in COMSOL Multiphysics. In this blog post, we will focus on shape optimization in wave optics. The beam is symmetric about the plane x = 3. The control parameters are the radii of Mar 21, 2013 · COMSOL’s LiveLink products house the CAD Import Module, which contains defeaturing and repair tools that can simplify CAD models and remove defects for better simulation results. Optimizing a Tuning Fork for Various Materials in COMSOL Multiphysics . The first algorithm is based on the SNOPT code developed by The Optimization Module’s globally convergent version of the MMA solver has an inner loop which ensures that each new outer iteration point is feasible and improves on the objective function value. Also, when Jun 13, 2018 · We have already discussed the factors that make a high-quality mesh and how to prepare a CFD model geometry for meshing. Jan 22, 2024 · The speed discrepancy is so large that the first approach is impractical for most applications of shape and topology optimization. Application ID: 46731. Acoustic Topology Optimization. Nov 22, 2022 · Shape optimization can be used to improve designs in many different physics areas. Optimization A month after reading the meshing article, I found another article in the March 2013 edition of Design World by the same author. So 3D optimization examples can be implemented in less than one hour for stiffness mechanism design (Fig. Dec 19, 2023 · December 19, 2023. Dec 29, 2015 · Optimization is the idea of altering model inputs, such as part dimensions and material properties, with the objective of improving some metric, while also considering a set of constraints. The Optimization Module contains the framework and functionality needed to perform gradient-based and gradient-free optimization on an existing COMSOL model. This model presents two examples of topology optimization of the magnetic circuit of a loudspeaker driver. , only the position of the mesh nodes changes. Step thrust bearings are used for supporting axial loads in rotating machinery, and because the load capacity depends on the geometry, you can use shape and topology optimization to maximize the load capacity of the bearing. The model studies optimal material distribution in the beam, which consists of a linear elastic material, structural steel. Physics-based modeling. The goal of the optimization is to find the optimal material distribution (solid or air) in a given design domain, here the ceiling of a 2D room, that minimizes the average sound pressure level in an objective region. Bright light-emitting diodes (LEDs) are revolutionizing the lighting industry and blue LEDs in particular are ushering in a new age of widespread efficient LED lighting. Our Minimizing the Flow Velocity in a Microchannel tutorial, for instance, provides an example of flow optimization. The Optimization Module, an add-on product to COMSOL Multiphysics ®, can be used for parameter estimation for stationary, time-dependent, and space-dependent parameter values. A parametric curve is a curve in 2D and 3D where you use a parameter to define the coordinates of the curve. Mar 21, 2013 · COMSOL offers an Optimization Module to solve parametric, topology, and time-dependent optimization problems. Remaining nodes in the sequence define the multiphysics problem on which the optimization process will act. This model example illustrates applications of this type that would nominally be Software. If you’re looking for ways to manage multiple solutions, version 5. Mar 30, 2022 · A Shell Shape Optimization module can be installed in Comsol for the optimization of an existing geometry to control the variable settings: the maximum displacement (d max) and filter radius (R min ). This is possible as long as all entries are globally available. The modeling workflow encompasses: Geometry and CAD. This is the first blog post in a two-part series on shape optimization in electromagnetics. In this session, we will show you how to get started with topology optimization and will, covering: Topology optimization with manufacturing constraints; Verification of body-fitted meshes Learn how to optimize a coil to achieve a desired B-field using COMSOL Multiphysics ® and the Optimization Module in Part 15 of the Introduction to Coil Modeling course. If this sequence contains Study Reference nodes and you are using a derivative Overview. The Polynomial Boundary feature is one of them. Learn about using COMSOL Multiphysics ® with the Wave Optics Module and Semiconductor Module to model optoelectronic devices. 1542 m and D 2 = 0. Feb 28, 2018 · February 28, 2018. The solver modifies the initial conditions at the beginning of a period to match the solution at the end of the period. Application ID: 101041. Oct 31, 2016 · October 31, 2016. This example exemplifies the basics in how to optimize shapes using COMSOL Multiphysics®. Nov 15, 2019 · The COMSOL Multiphysics® software supports gradient-based shape optimization by fixing the mesh topology; i. For example, the coordinates (s ·cos ( s ), s ·sin ( s)) for a parameter s that runs from 0 to 10 π defines a spiral in 2D. The descriptions involve physics phenomena such as transport of charged and Optimization Module Updates. This example shows how to perform a topology optimization with several load and constraint cases. The importance of blue LEDs was marked by this year’s Nobel Prize in physics Apr 20, 2017 · April 20, 2017. Optimizing a Tuning Fork for Various Materials in COMSOL Multiphysics Dec 16, 2022 · Shape optimization can be used to enhance device design in many application areas, including electromagnetics and RF. Not anymore. This tutorial introduces the use of topology optimization in acoustics. User Interface. Aug 2, 2013 · August 2, 2013. Dec 24, 2015 · The SNOPT method is used to solve the optimization problem. The optimised shapes both exhibit the expected tree-like shape with a solid base in the vicinity of the semiconductor device and increasingly fine dendrite/branch structures toward the domain borders. In this blog post, we will provide two examples of how you can benefit from using shape optimization and show you what you can achieve when applying the shape optimization features in the COMSOL Multiphysics ® software to microwave and millimeter-wave (mmWave) applications. The Model Builder in COMSOL Multiphysics ® provides you with a complete simulation environment and a consistent modeling workflow from start to finish, regardless of the type of design or process you wish to analyze and develop. These parameters have a significant impact on the final optimization result and careful selection of the values d max and R min allows users to get the most effective solution. Shape optimization works by changing the shape of the steps in the bearing, whereas topology Jan 13, 2016 · To accurately compute lift and drag forces and optimize any airfoil following the NACA naming convention, COMSOL Multiphysics version 5. The Battery Design Module is an add-on to the COMSOL Multiphysics ® software that encompasses descriptions over a large range of scales, from the detailed structures in the battery's porous electrode to the battery pack scale including thermal management systems. Suggested Products. In COMSOL we have possibility to do parameter optimization, sha Jan 24, 2020 · The optimization uses an approximate representation of the physics in the areas to be removed, so you should remove these areas from the geometry and perform a new simulation to verify the optimization results. Modeling Overview: Parameter Estimation Get an introduction to performing parameter estimation with the Optimization Module, an add-on to COMSOL Multiphysics ® . 2 includes a new example, the NACA Airfoil Optimization app. Before going into detail, it is necessary to clarify that in general there are 2 approaches: Global Bracket — Topology Optimization. Aug 17, 2023 · Optimization is a branch of applied mathematics which is covered in COMSOL Multiphysics. This example shows how to perform parameter optimization on a lens system. Download the application files. by Rachel Keatley. These optimization problems often have to be regularized, and this process is fully supported through the Density Model tool in the Optimization Module. Let’s take a closer look at these three examples. Learn how to use COMSOL Multiphysics® for specific application areas. In 2022, Acculution designed a phase plug for an acoustic waveguide for a (client’s) loudspeaker application purely via acoustic topology optimization, and this is seemingly the first in the world. 1. Dimensional optimization is one of the more common In this video I will show you how to perform a parameter optimization in COMSOL Multiphysics. Oct 31, 2023 · Using the example of two shells in the article, two important parameters d max and R min included in the settings before optimization in Comsol were analyzed. Jun 3, 2021 · For example, you can perform a shape or topology optimization of a loudspeaker’s dome and waveguide, magnetic circuit, and spider membrane with the COMSOL Multiphysics® software. This tutorial demonstrates how to compute the periodic steady-state solution of a nonlinear model problem using an optimization solver. 5, comes with several built-in features for shape optimization. 3 ), meaning that the control parameters change a material parameter through an interpolation function. Hence, you need good tools to keep your model parameters organized. 0458 m. Whereas the gradient-based optimization method can compute an exact analytic derivative of an objective function and any associated constraint functions, it does require these functions to be smooth and differentiable. These parameters are set as follows: d max = 2 m, R min = 0. The objective function is therefore a function of both the control variables and the PDE solution, which is in turn a function of the control variables. py lq rh wi eu zq sk sc yy yy