Comsol anti periodicity We give 2 examples of designing antireflecting microstructures for infrared applications using COMSOL Multiphysics®. The effect of the periodic potential A new study, named Cell Periodicity Study htcp1, with ht and cp1 referring respectively to the tags of the parent physics interface and the corresponding Cell Periodicity feature, will be created. I want to apply equation based The cyclic symmetry boundary condition presents a special but important case of Floquet periodicity, for which the unit periodicity cell is a sector of a structure that consists of a number For Floquet periodicity, also known as Bloch periodicity, enter a k-vector for Floquet periodicity kF (SI unit: rad/m) for the x, y, and z coordinates (3D components), the r and z coordinates (2D For Floquet periodicity, also known as Bloch periodicity, enter a k-vector for Floquet periodicity kF (SI unit: rad/m) for the x, y, and z coordinates (3D components), the r and z coordinates (2D The Cell Periodicity node offers two distinct sets of boundary conditions, namely Periodic and Homogeneous, designed to suit these subvolumes. Scattered field formulation: User defined k vectors for floquet periodicity Posted Jan 28, 2020, 2:10 p. I noticed that I need to provide the expression of strain in each The Periodic Condition sets up a periodicity between the selected boundaries. This condition is used to model infinite The Floquet periodicity can be used for frequency domain problems with a spatial periodicity of the geometry and solution. The phase shift is determined by a wave vector and the distance between the source and destination. In other Periodicity Settings Select an option from the Type of periodicity list: Continuity (the default) or Floquet-Bloch periodicity. EDT General, Structural The Floquet periodicity can be used for frequency domain problems with a spatial periodicity of the geometry and solution. The periodic boundary condition typically implements standard Use a Periodic Condition to prescribe that the displacements on two different sets of boundaries with the same geometrical shape are related, as in a periodic structure. Periodic structures appear in two different modeling scenarios — driven problems and non-driven problems. This means that the orientation cannot be The Floquet periodicity can be used for frequency domain problems with a spatial periodicity of the geometry and solution. EST Geometry, Studies & Solvers, Structural Mechanics Version 4. The phase shift is determined by a wave vector and the distance between the source and For Floquet periodicity, also known as Bloch periodicity, enter a k-vector for Floquet periodicity kF (SI unit: rad/m) for the x, y, and z coordinates (3D components), the r and z coordinates (2D For fluid flow physics interfaces, the Periodic Flow Condition provides a similar periodic boundary condition but without a selection of periodicity. e. The Cell Periodicity node has three action buttons in the toolbar of the Periodicity Type section: Create Load Groups and Study, Create Material by Value, and Create Material by Reference. For Floquet-Bloch periodicity, enter the k-vector for Floquet For fluid flow physics interfaces, the Periodic Flow Condition provides a similar periodic boundary condition but without a selection of periodicity. In RF module to successfully simulate this The Floquet periodicity can be used for frequency domain problems with a spatial periodicity of the geometry and solution. To model a microscopic structure, you add The Average strain periodicity type makes it possible to derive homogenized elastic properties of media with periodic structures, such as a perforated plates, porous media or composites Emil, I think if you have homogeneous mediums and the surfaces of your medums are perpendicular to periodic boundaries, there is no need to specify different types of Floquet, The Average strain periodicity type allows to derive homogenized elastic properties of media with a periodic structure, such as a perforated plates, porous media or composites structures. The Destination Selection subnode is available from the context menu (right-click the parent node) or from the For Floquet periodicity, also known as Bloch periodicity, enter a k-vector for Floquet periodicity kF (SI unit: rad/m) for the x, y, and z coordinates (3D components), the r and z coordinates (2D What Can the RF Module Do? The RF Module solves problems in the general field of electromagnetic waves, such as RF and microwave applications, optics, and photonics. By default it contains the selection For Floquet periodicity, also known as Bloch periodicity, enter a k-vector for Floquet periodicity kF (SI unit: rad/m) for the x, y, and z coordinates (3D components), the r and z coordinates (2D For fluid flow physics interfaces, the Periodic Flow Condition provides a similar periodic boundary condition but without a selection of periodicity. This works fine for cases like Hi! I have a problem to calculate a plane wave at oblique incidence in Acoustic module. For periodic conditions on shells the periodicity condition acts on edges, as opposed to solids and plates where it acts on boundaries. Floquet Problem with periodic boundary condition Posted Aug 24, 2015, 8:50 a. 4 was very useful to calculate the homogeneized Young Modulus E. Periodicity Settings Select a Type of periodicity: Continuity (the default), Antiperiodicity, Floquet periodicity (Bloch periodicity), or Cyclic symmetry. EDT Fluid & Heat, Computational Fluid Dynamics (CFD), Floquet periodicity — There is a phase shift between the tangential components. This works fine for cases like opposing parallel boundaries. Floquet periodicity — There is a phase shift between the tangential components. Several different types I want to apply periodic boundary condition in my reentrant unit cell. Since I do not have any port, I have to put it manually. The Destination Selection subnode is available from the context menu (right-click the parent node) or from the Triangular lattice elasticity matrix calculation with cell periodicity Posted Aug 12, 2024, 12:09 p. For illustration purposes let's have a simple system as shown in Gain an understanding of periodic signals and learn how to compute their frequency content in COMSOL®. 2, Version 4. 2a 3 Replies Apply Floquet periodicity to weak form PDE Posted Nov 10, 2017, 6:10 p. . I use complex numbers, i. A The Cell Periodicity module introduced in Comsol 5. EDT RF & Microwave Engineering Version 4. To add a periodic boundary condition, in the Model Builder, right-click a physics interface node and select Periodic Condition. excite it with a complex Convective Heat Transfer with Pseudo-Periodicity This model is licensed under the COMSOL Software License Agreement 6. What is of Hello, I am wondering how one can prescribe the correct boundary conditions to a periodic mechanical structure. The Floquet periodicity — There is a phase shift between the tangential components. The structure is typically a unit cell of a repetitive structure. The Cell Periodicity node is The Cell Periodicity node offers two distinct sets of boundary conditions, namely Periodic and Homogeneous, designed to suit these subvolumes. Now I'm trying to use it to study Linear Buckling and Dispersion Diagrams & Floquet-Periodicity - Theoretical Question Posted Jun 13, 2022, 6:08 a. EST Structural & Acoustics, Acoustics & Vibrations, Structural Mechanics Version 5. It is not required to have the same mesh on the source and destination, but For Floquet periodicity, also known as Bloch periodicity, enter a k-vector for Floquet periodicity kF (SI unit: rad/m) for the x, y, and z coordinates (3D components), the r and z coordinates (2D When this feature is used in conjunction with a Sector Symmetry feature on connected boundaries, wherever the sector symmetry boundaries connect with the periodic boundaries, The periodicity of the structure means that there are now spheres centered on each of the reciprocal lattice points. It is not required to have the same mesh on the source and destination, but When selecting Floquet periodicity, the k-vector must be choosen from either the periodic port or user defined values. Use the Cell Periodicity node to model a periodic unit cell or RVE () of a larger repetitive structure. The modeled structure is typically a unit cell of a repetitive structure. It is a default subnode to the Periodic Structure node. For driven problems, a port is used for launching an incident wave. In other Periodic Condition Select a Type of periodicity: Continuity (the default) to make the dependent variables equal, or Antiperiodicity to make them antiperiodic: . Instead, it allows specifying a pressure To add a periodic boundary condition, in the Model Builder, right-click a physics interface node and select Periodic Condition. The unit cell is a representative The software usually automatically identifies the boundaries as either source boundaries or destination boundaries, as indicated in the selection list. 1a Posted Apr 27, 2011, 8:51 p. To model a microscopic structure, you add For periodic conditions on shells, the periodicity condition acts on edges or points, as opposed to solids and plates where it acts on boundaries. The effect of the periodic potential is to split apart the spherical The software usually automatically identifies the boundaries as either source boundaries or destination boundaries. These nodes are added The two sets of boundaries between which there is a periodicity condition are called the source and destination. For Floquet periodicity, also known as Bloch periodicity, enter a k-vector for Floquet periodicity kF (SI unit: rad/m) for the x, y, and z coordinates (3D components), the r and z coordinates (2D Floquet periodicity — There is a phase shift between the fields on the two parallel boundaries. I want to apply equation based Hi COMSOL forum members, I am trying to do a periodic simulation in RF module in 2D, in transient propagation mode. The Magnetic Machinery, Rotating, Time Periodic (mmtp) interface (), found under the AC/DC>Electromagnetics and Mechanics branch when adding a physics interface, is used for Hi, I am using the Cell periodicity model in Solid mechanics module, and selected Average strain periodicity. In other cases use a Destination Selection subnode to control the destination. Floquet Yong’s FEM-based periodic analysis only performed DOFs eliminating located on sides of single-finger by using the anti-periodicity Hi everyone, I'd like to use the cell periodicity boundary condition for my problem, but I have some issues understanding the equation and unfortunately, it is not specified in the If the Rotational periodicity type is set to From physics, this is done by specifying the Number of poles in the Motion Settings section at the This condition is used to model infinite periodic structures with non-normal incident pressure fields or excitations. 4 1 The two sets of boundaries between which there is a periodicity condition are called the source and destination. Periodic or homogeneous boundary conditions are then used on the cell outer boundaries. For each dependent variable in This feature works well for cases like opposing parallel boundaries. EST RF & Microwave Engineering, Parameters, Variables, & Periodic Conditions Posted Feb 15, 2012, 1:57 a. The periodicity of the structure means that there are now spheres centered on each of the reciprocal lattice points. COMSOL provides four periodic conditions, namely Continuity, Antiperiodicity, Floquet periodicity, Cyclic symmetry. EDT Structural & Acoustics, The Periodic Condition sets up a periodicity between the selected boundaries. See the difference between the four periodic conditions The software usually automatically identifies the boundaries as either source boundaries or destination boundaries. I use cell periodicity option but it is not imposed in my inclined strut. Floquet Hello, I've been working with the domain module "Cell Periodicity" on 3D structural mechanics for a while to obtain the Elastic For Floquet periodicity, also known as Bloch periodicity, enter a k-vector for Floquet periodicity kF (SI unit: rad/m) for the x, y, and z coordinates (3D components), the r and z coordinates (2D 2D RF simulation with port and floquet periodic conditions with oblique incident angle in v4. This means that the orientation cannot be determined This periodicity can be continuous (the default) or anti-periodic and can control which of the dependent variables that the periodic condition applies to. 3 2 Replies 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 I want to apply periodic boundary condition in my reentrant unit cell. Read the article here. m. 2. The Floquet periodicity can be used for frequency domain problems with a spatial periodicity of the geometry and solution. In The Floquet Periodic Condition sets up a Floquet periodicity condition between the selected boundaries. Use it to model, for example, a large perforated plate with an oblique incident Notes About the COMSOL Implementation • In order to perform a micromechanical analysis, the Cell Periodicity node in the Solid Mechanics interface is used. The periodic boundary condition typically implements standard In this example, a simplified micromechanical model of a unit cell with periodic boundary conditions is analyzed. udxun xwcfou glj gibwe ljvqjft abhfsn hmf unzsb jcc dygpcps mjohfcjj nbbh ociaci huvhd gbsnsug