the destination map, not sure what the source frame should be. Discussion Closed This discussion was created more than 6 months ago and has been closed. The incident heat flux from the laser is modeled as spatially varying, with time varying coordinates for the location of the incident heat flux. The General Extrusion feature is available in the model tree under Component > Definitions > Component Coupling. A typical microfluidic device. In this example, the operator is used by the Transport of Diluted Species interface to define the velocity field (illustrated below). The model in question is called Laser Heating of a Silicon Wafer, and can be found in the Model Gallery. At any given time, the (x, y, z) coordinates of this point are given by: (0.5[in]*cos(t), 0.5[in]*sin(t), 2.75e-4[m]), where is the angular velocity of the rotating wafer disk. Submit feedback about this page or contact support here. Enter in the equation shown which is the ramp function of the wall deflection, with an added term limiting the expression to occur only when the depth is below the strut. A symmetry is used because the modeled excavation is only the right half of the full excavation. Because the source entities are different, two operators are needed. Hi It is also possible to define the mapping in terms of coordinate systems. Right: Temperature mapped from the parabola to the domain. COMSOL Multiphysics will take care of T_s^{-1}(T_d(x_d,y_d)), a necessary step in identifying the source coordinates. FIGURE 1. Using the General Extrusion Coupling Operator in COMSOL: Dynamic Probe The temperature will vary linearly with x. When this check box is left unchecked, COMSOL Multiphysics assumes that we have explicit expressions for each coordinate of the source as functions of coordinates of the destination. Submit feedback about this page or contact support here. Therefore, we can greatly reduce our model by solving only for the fluid flow within one unit cell and patterning this flow solution throughout the modeling domain for the convection-diffusion problem. This time in the x direction and using the second general extrusion operator in the u0 field. Posted 15 feb 2011, 16:18 UTC In the results, how is Point 2 related to the general extrusion? Two boundary selections have been created and renamed wall_diaphragm and wall_soil. listed if standards is not an option). Lets consider a point on the disk at a distance of 0.5 inches from the center of the disk located at (0,0). Clear the selection and add the middle strut, then change the expression from stage 1 to stage 2 to activate it only when the depth moves below the second strut. Note that the operator name is kept to its default: genext1. A 2D parabolic curve given by \frac{y}{d} =(\frac{ x}{d})^2 is in a square domain of side d. Our task is to build an operator that maps data from this curve (represented in blue in the figure below) to different parts of the square. Also, are there other approaches to do this? Frontiers | Development of multiphysics coupling system for nuclear We want a depth ranging from 0 to -26 meters with a step size of two meters. Once a strut is activated, it will generate a force proportional to the struts stiffness and the horizontal displacement. have some questions. Within the original domain, a displacement of zero is used. It can be used for a variety of different purposes, examples of which are presented here. I deplore the glaring oversight of COMSOL: Considering how frequently one encounters problems that include a combination of Rotationally-Symmetric and Cartesian components, that COMSOL has not seen fit to provide a specific operator for this case! Sample data defined on the xy-plane, centered at the origin. Is it possible to "paste" two functions in COMSOL? The flow solution on this unit cell is also plotted, as shown below. Check out our Deep Excavation Model for more information. If we know this ahead of time, it is possible to exploit the periodicity to reduce computational requirements. This button displays the currently selected search type. indeed I do not believe I really understand what you intend to do. the setting of the extrusion is shown in the attachment (the .PNG file ). The information provided may be out of date. Examples of the General Extrusion Operator - COMSOL Multiphysics Therefore, only a single operator is needed to map the velocity field into all of the domains. This time in the x direction and using the second general extrusion operator in the u0 field. Using General Extrusion Operators to Model Rotation | COMSOL Blog Currently we are ISO 9001 certified. The species concentration (shown in color) is solved in all three repeating domains. Extrusion operators help us construct normal current density boundary conditions on each side of the ideal p-n junction. Multiscale Modeling in High-Frequency Electromagnetics, 2023 by COMSOL. 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. I am trying to implement the Periodic Boundary condition in a 3D model by following your post but I have some questions. Create a second line graph, showing the surface settlement, or vertical displacement, as a function of the distance from the wall. Modeling an Excavation in COMSOL. For example, to map data from a boundary around a centerline, introduce a cylindrical system, and use those coordinate system variables to define the source and destination map. A pressure constraint at a single point is used to gauge fix the pressure field. The Graphics Window: Effective and Beautiful Postprocessing, Generating Microsoft PowerPoint Slideshows from Your Models, Combining Adaptive Mesh Refinement with Data Filtering. general extrusion from 2D geometry to 2D geomtry - comsol.fr The ramp location is set to be -U_max. It can be used for a variety of different purposes, examples of which are presented here. Although it is not strictly necessary to do so, the mesh is copied from the one domain used to solve for the fluid flow to all of the other domains. How to use the General Extrusion - COMSOL Multiphysics | Facebook This graph shows the wall deflection or horizontal displacement as a function of depth for different excavation steps. Additional settings are shown below. There are two ways to model an excavation in COMSOL Multiphysics, both of which include a parametric sweep. The same transforms can be implemented in three dimensions. We can tag the different sides as 1 and 2, as illustrated in the figure below. Extruding Data Along a Direction. Alle Rechte vorbehalten. Within their design, a common goal is to achieve optimal mixing within a small surface area, hence the serpentine channel. Linear Extrusion operators are easier to build, but their utility is limited to affine transformations.General Extrusion operators are more general but take more work to define. As in Example 1, we enter the expression on the right-hand side in the destination map. Only the data in the z-expression is mapped.
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