general extrusion comsol

To add a General Extrusion operator, we go to Definitions > Component Couplings > General Extrusion. The General Extrusion operators provide a mechanism for transforming fields from one coordinate system to another. Online Support Center: https://www.comsol.com/support The schematic below illustrates that there are two fluid inlets, both of which carry the same solvent (water) but a different solute. In this example, one expression is sufficient enough to uniquely relate any destination point in the square domain to a source point on the parabolic curve. Settings used to map data from a boundary parallel to the xy-plane along the z direction. Because the source entities are different, two operators are needed. This will enable us to define the flow field in the entire serpentine section. This approach, as explained earlier, is limited to cases in which the source and destination are related by affine transformations. A linear mapping built using a General Extrusion operator. Learn how to use the withsol operator in COMSOL Multiphysics®. Previously on the blog, we introduced you to Linear Extrusion operators and demonstrated their use in mapping variables between a source and a destination. Given an expression defined on a plane, e.g., the xy-plane, it is desired to map this data along the z direction. In the General Extrusion settings window shown above, the labels under Destination Map and Source read x^i–expression and y^i–expression rather than x–expression and y–expression. Learn about heat transfer in thin layers and see how to use the Heat Transfer Module. Extrusion operators help us construct normal current density boundary conditions on each side of the ideal p-n junction. In this example, one expression is sufficient enough to uniquely relate any destination point in the square domain to a source point on the parabolic curve. The same transforms can be implemented in three dimensions. COMSOL Multiphysics includes built-in features pertaining to such physical effects. Learn how to integrate along streamlines and extract particle statistics for your fluid flow models. Note that the source map needs to be one-to-one for the inverse to exist. Your internet explorer is in compatibility mode and may not be displaying the website correctly. It can be used for a variety of different purposes, examples of which are presented here. To implement, define a General Extrusion operator on a boundary parallel to the xy-plane, with the z-expression blank for both the Source Map and a Destination Map. x_s = ax_d + by_d + e, \qquad y_s = cx_d + dy_d + f. r_s = \sqrt{x_d^2 + y_d^2}, \qquad z_s = z_d. Using a General Extrusion operator to copy data from the 2D axisymmetric domain to the corresponding 3D domain. The same transforms can be implemented in three dimensions. General Extrusions is owned and run by the Schuler family. It can be used for a variety of different purposes, examples of which are presented here. A one-to-one source map makes the search return, at most, one source point for a given destination point. Extruding Data Along a Direction. Given an expression defined on a plane, e.g., the xy-plane, it is desired to map this data along the z direction. The General Extrusion operator will map data from the boundary into the volume, along the z direction, as shown in the following screenshots. Alle Rechte vorbehalten. If the mapping is affine, it is sufficient to know how some points in the source correspond to points in the destination entity. Here, V refers to the electric potential at a point on the bottom side, while genext1(V) refers to the electric potential vertically on the top side. Sample data defined on the xy-plane, centered at the origin. A similar boundary condition is used on the bottom side of the junction. The Barmag-Lenzing film tape line Evotex (evolution in tape extrusion) forms the basis of turnkey single machinery source sack plants. At the outlet, we want the species to be well mixed. This is reasonable to do since it is assumed that the flow field is independent of the species concentration. extrusion coupling error - COMSOL The destination map here consists of the transient coordinates where we would like to evaluate temperature. Learn how to manually set the scaling of variables. COMSOL Multiphysics offers two coupling operators to specify this mapping: Linear Extrusion operators and General Extrusion operators. Your internet explorer is in compatibility mode and may not be displaying the website correctly. We can tag the different sides as 1 and 2, as illustrated in the figure below. I believe René's suggestion is exactly what you need but anyways, my idea is to add a 2D Plot Group/Surface, set the Data Set to Cut Plane, plot and then. When building the mapping, it is important to ask the following question: Given the coordinates of the destination point, how do we go to the source point? Hi, Alle Rechte vorbehalten. Sample data defined on the xy-plane, centered at the origin. In addition to simply copying known quantities, these operators can be used to create nonlocal couplings between unknown variables, as illustrated in our p-n junction example. To implement, define a General Extrusion operator on a boundary parallel to the xy-plane, with the z-expression blank for both the Source Map and a Destination Map. we first need to invert the expression L=\frac{x_s}{2}\sqrt{1+4(\frac{x_s}{d})^2}+\frac{d}{4}\ln(2\frac{x_s}{d}+\sqrt{1+4(\frac{x_s}{d})^2}) and write x_s in terms of L. That’s no fun at all! To see how this General Extrusion operator maps variables, consider a plane stationary heat conduction problem with the left and right edges at temperatures of 300 K and 400 K, respectively. We want an operator that will copy from a point on the parabola to a point in the square, such that the distance of the destination point from the origin is equal to the length of the segment of the parabola between the origin and the source point. For affine relations, General Extrusion operators can be used as an alternative to Linear Extrusion operators. Using General Extrusion Operators to Model Periodic Structures | COMSOL ... At a point P_d in the destination entity, we want to compute a quantity that is a function of another quantity defined at the source entity. How did you select the source in the general extrusion settings? Learn the steps and use cases for a manual setup of the GMG solver. To implement the normal current boundary condition on side 1, we need access to the electric potential V_2 on side 2. Center: Temperature along the parabola. Thus, two extrusion operators are required. We can similarly evaluate the temperature at any other point. Both cases involve mapping between points that share the same x-coordinate. We want an operator that will copy from a point on the parabola to a point in the square, such that the distance of the destination point from the origin is equal to the length of the segment of the parabola between the origin and the source point. The periodic velocity field, indicated by the arrows, is solved in one domain and mapped into the others. Learn how to resolve inconsistent initial values in time-dependent studies in COMSOL Multiphysics®. Extruding Data Along a Direction. This computed flow field can then be used as input for the convection-diffusion equation governing the species concentration. The plot below shows the temperature evaluated at the focal point of the moving laser: Learn how to synchronize and import a SOLIDWORKS® CAD geometry into COMSOL Multiphysics®. They are not necessarily pertaining to the x or y coordinates in the source or destination. Mapping of data defined on a boundary (left) along the direction normal to the plane and into a volume (right). Submit feedback about this page or contact support here. listed if standards is not an option). The top and bottom surfaces are thermally insulated, and there are no heat sources. Mapping of data defined on a boundary (left) along the direction normal to the plane and into a volume (right). Simulation Organogenesis in COMSOL: Deforming and Interacting Domains Is it possible to "paste" two functions in COMSOL? Get an introduction to the Composite Materials Module, an add-on to COMSOL®. In such cases, we can use projection, integration, average, maximum, or minimum component couplings. If the structural boundary conditions are not axisymmetric, we can save time by performing an axisymmetric thermal analysis in one component, and then mapping the temperature from the 2D axisymmetric domain to the 3D domain for structural analysis in another component. One option is to use the General Extrusion coupling operator. Right: Temperature mapped from the parabola to the domain. Get an introduction to the software and learn how to model Joule heating and thermal expansion. This can be either an explicit definition of the source point P_s as a function of P_d or an implicit relation between P_d and P_s. See how the Optimization Module can be applied to power electromagnetics models in COMSOL Multiphysics®. In practice, COMSOL Multiphysics does not construct an analytic expression for the inverse of the source map. It is also possible to define the mapping in terms of coordinate systems. Settings used to revolve data about the azimuthal axis of a cylindrical coordinate system. The parabola is the source. These indices are, in a sense, coordinates of an intermediate mesh, and a General Extrusion operator matches source and destination points that have the same intermediate coordinates. It is also possible to define the mapping in terms of coordinate systems. Extrusion operators are used to construct pointwise relations between source and destination points. Your internet explorer is in compatibility mode and may not be displaying the website correctly. You can fix this by pressing 'F12' on your keyboard, Selecting 'Document Mode' and choosing 'standards' (or the latest version Because the source entities are different, two operators are needed. Considering a variable defined on the xy-plane within a unit square centered at the origin, as shown above, it is possible to implement a variety of transforms simply via different destination maps, and leaving the source map unchanged. Get an introduction to LiveLink™ for MATLAB®. They are not necessarily pertaining to the x or y coordinates in the source or destination. The two circles in the geometry have centers at the origin and radii of 1.0 and 1.5. This approach helps avoid confusion if there is an extrusion or another operator also called genext1 or another variable called T in the second component. The approach we have applied here is appropriate for any instance in which a spatially repeating solution needs to be utilized by other physics. Learn how to use COMSOL Multiphysics® for specific application areas. Extrusion operators are used to identify which point in the source entity corresponds to a point in the destination entity. I need to obtain a whole bunch of data in the variables section, ef., Mass fraction, Density and others. In this blog post, we will look at addressing this by using the General Extrusion operators and discuss why this approach is useful. The parameters J_s, q, k, \textrm{and } T represent the following, respectively: the saturation current density, the electronic charge, Boltzmann’s constant, and temperature. Learn how to simulate radiation in semitransparent media using COMSOL Multiphysics® and the Heat Transfer Module. Learn how to reduce the amount of solution data stored in your COMSOL Multiphysics® model file. Extruding Data Along a Direction. Considering a variable defined on the xy-plane within a unit square centered at the origin, as shown above, it is possible to implement a variety of transforms simply via different destination maps, and leaving the source map unchanged. Similarly, on side 2, we need access to the electric potential V_1 on the other side of the junction.
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