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. This example models a split and recombine mixer channel in which a tracer fluid is introduced and mixed by multi-lamination.

Diffusion is removed from the model using an extremely low diffusion coefficient so that any numerical diffusion can be studied in the lamination interfaces. The results compare well with Glatzel et al Ref 1.

Glatzel et al. This model example illustrates applications of this type that would nominally be built using the following products:. Furthermore, this example may also be defined and modeled using components from the following product combinations:. Particular functionality may be common to several products.

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. Esci Accedi Contatti.

### Top nine hints for working with Comsol

OK Ulteriori informazioni. Ricerca rapida. Prodotti consigliati Scarica i file del modello This model example illustrates applications of this type that would nominally be built using the following products: Microfluidics Module.A beam splitter is used to split a single beam of light into two. One way of making a splitter is to deposit a thin layer of metal between two glass prisms.

The beam is slightly attenuated within the layer, and split into two paths. In this example, the thin metal layer is modeled using a transition boundary condition which reduces the memory requirements. Losses in the metal layer are also computed. This model example illustrates applications of this type that would nominally be built using the following products:.

Furthermore, this example may also be defined and modeled using components from the following product combinations:. Particular functionality may be common to several products. 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.

Sair Logar Contato. OK Saiba Mais. Beam Splitter Application ID: Suggested Products Download the application files This model example illustrates applications of this type that would nominally be built using the following products: Wave Optics Module.This website uses cookies to function and to improve your experience.

By continuing to use our site, you agree to our use of cookies. This example models a split and recombine mixer channel in which a tracer fluid is introduced and mixed by multi-lamination.

Diffusion is removed from the model using an extremely low diffusion coefficient so that any numerical diffusion can be studied in the lamination interfaces. The results compare well with Glatzel et al Ref 1. Glatzel et al.

This model example illustrates applications of this type that would nominally be built using the following products:.

Furthermore, this example may also be defined and modeled using components from the following product combinations:. Particular functionality may be common to several products. To determine the right combination of products for your modeling needs, review the Specification Chart and make use of a free evaluation license.

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.

North America. Log Out Log In Contact. OK Learn More. Quick Search. Suggested Products Download the application files This model example illustrates applications of this type that would nominally be built using the following products: Microfluidics Module. Log Out.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. The Refine and Adapt operations are two useful tools for doing just that. In this blog post, we demonstrate how these operations work and how you can use them to get the most out of your imported meshes. The Refine operation provides a convenient and quick way of reducing the element size in an imported mesh.

As the name suggests, the operation essentially partitions the elements that are already present in the mesh. Having a look at the settings available, shown in the figure below, we can select the Number of refinements to perform and a bounding box for the operation.

It is also possible to perform the operation on the entire mesh or a selection of domains, boundaries, or edges. However, the option that we will be discussing in this article is the Refinement methodfor which there are two settings to choose from:.

**COMSOL Basics: Laminar fluid flow through a pipe**

The Settings window for the Refine operation. It is possible to specify the Refinement method and the Number of refinementsas well as a bounding box for the operation and a Geometric Entity Selection. The second figure in the image below shows the element after one refinement step using the Split longest side method.

The operation partitions the longest edge of the element into two equal pieces. The element is then divided in two using the new edges.

Note, however, that when you have several connected elements, this will lead to some elements being split into more than two new ones to preserve a conforming mesh. Three mesh plots of a single tetrahedral mesh element before and after building the Refine operation. Left: Unpartitioned element.

Center: Element partitioned using the Split longest side setting. Right: Element partitioned using the Regular refinement setting. The element colors in the center and right figures indicate mesh element quality. Using Regular refinementthe third plot shows the result on the same tetrahedral element.

This time, every edge has been divided into two and then used to split the element into several smaller elements of the same type. For a tetrahedron, this results in eight new elements where there was previously only one.Diese Website verwendet Cookies, um einwandfrei zu funktionieren und Ihr Erlebnis zu verbessern. You have reached the end of the Learning Center. 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! One such tool, partition operations, enables you to separate out any part of your model's geometry. This is useful for splitting geometric entities such as objects, domains, boundaries, and edges and for removing parts of your model's geometry, either to clean it up or to simplify the model.

In addition, this functionality is helpful for when you want to improve a model's mesh as well as when you are working with a geometry that is complex or has parts exhibiting a high aspect ratio.

In this video, we discuss how to partition a geometry with work planes using two examples. First, using a helix primitive object, we show you how to divide and conquer the meshing for a relatively complex geometry by splitting it into smaller, simpler domains. Next, using the geometry from the shell-and-tube heat exchanger tutorial model, we demonstrate exploiting the symmetry of an object to simplify a simulation.

This is done by splitting and then removing one half of the geometry using the Partition Objects and Delete Entities operations, respectively. As a result, you can significantly reduce the computational time and memory required to solve the model.

## Modeling a Complementary Split Ring Resonator with Ease

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 Partition Geometry. Play Change 3D Geometry into 2D. Create 2D Geometry Use the software's tools to build 2D geometries. Create 3D Geometry Construct 3D objects using the software's tools.

Partition Geometry Split geometry to simplify model and improve mesh. Explore Learning Center.You have reached the end of the Learning Center. 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!

One such tool, partition operations, enables you to separate out any part of your model's geometry. This is useful for splitting geometric entities such as objects, domains, boundaries, and edges and for removing parts of your model's geometry, either to clean it up or to simplify the model. In addition, this functionality is helpful for when you want to improve a model's mesh as well as when you are working with a geometry that is complex or has parts exhibiting a high aspect ratio. In this video, we discuss how to partition a geometry with work planes using two examples.

First, using a helix primitive object, we show you how to divide and conquer the meshing for a relatively complex geometry by splitting it into smaller, simpler domains. Next, using the geometry from the shell-and-tube heat exchanger tutorial model, we demonstrate exploiting the symmetry of an object to simplify a simulation. This is done by splitting and then removing one half of the geometry using the Partition Objects and Delete Entities operations, respectively.

As a result, you can significantly reduce the computational time and memory required to solve the model. 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. Repeat Partition Geometry. Play Change 3D Geometry into 2D. Create 2D Geometry Use the software's tools to build 2D geometries.

Create 3D Geometry Construct 3D objects using the software's tools. Partition Geometry Split geometry to simplify model and improve mesh. Explore Learning Center.This website uses cookies to function and to improve your experience. By continuing to use our site, you agree to our use of cookies. Last month, my colleague Alexandra Foley introduced an RF modeling example that uses periodic boundary conditions. Another RF model that can be created with ease by taking advantage of periodic boundary conditions is the Frequency Selective Surface, Periodic Complementary Split Ring Resonator model.

Frequency selective surfaces FSS are periodic structures that function as filters for plane waves, such as microwave frequency waves. These structures can transmit, absorb, or reflect different amounts of radiation at varied frequencies. Typically, they have a bandstop or bandpass frequency response. Frequency selective surfaces are used in a variety of applications. There, the FSS were designed to absorb incident radiation, rather than scatter it. FSS surfaces are typically constructed with metallic patterns that are arranged periodically.

Complementary split ring resonators can be used to build such structures. As a type of planar resonator, complementary split ring resonators are primarily used to simulate metamaterial elements. When designing a bandpass structure, for example, they can be arranged periodically. Modeling these resonators in a periodic configuration can become quite complex and time-consuming.

However, you can overcome these design challenges by implementing periodic boundary conditions into your model. COMSOL Multiphysics, together with the RF Moduleenables you to model a periodic complementary split ring resonator with ease by utilizing perfectly matched layers and periodic boundary conditions. In this model, a split ring slot is patterned on a thin copper layer which is modeled as a perfect electric conductor that rests on a PTFE substrate that is 2 mm in thickness.

A single unit cell of the complementary split ring resonator. The model is created with periodic boundary conditions. To simulate a 2D infinite array, as shown above, you can model just one unit cell of the complementary split ring resonator.

This is done using Floquet-periodic boundary conditions on each of the four sides of the unit cell. To learn how to do this, check out the model documentation, where step-by-step instructions are provided. S-parameter plot showing the periodic structure functions as a bandpass filter near 4. This consent may be withdrawn. 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.

North America. Log Out Log In Contact. OK Learn More. August 6, Complementary Split Ring Resonators As a type of planar resonator, complementary split ring resonators are primarily used to simulate metamaterial elements. Get New Posts by Email.

## How to Refine and Adapt Imported Meshes

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