Right click again to duplicate it twice, since we want similar settings for the second and third struts. 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. Several cases are illustrated in the table below. this defines if you should us a linear or general Extrusion or Projection A symmetry is used because the modeled excavation is only the right half of the full excavation. We can then consider examples in which the General Extrusion operator must be used. But no possibility to define variables. Now that we know how to find the corresponding coordinates of the source point, given any point (x,y) in the destination, we enter the right-hand side of the above equation (without the subscripts) in the destination map of the General Extrusion settings window. You can learn more about the use of projection operators in this previous blog post. Schematic of a microfluidic mixer that depicts the repeated unit cell and the inlet and outlet zones. Adding a General Extrusion coupling operator.The green vector field is the transport term used to model the wafer rotation. Left: Temperature varies linearly from left to right. Mapping of data defined on a cross section (left) around an axis of symmetry and into a volume (right). Sample data defined on the xy-plane, centered at the origin. I suppose by point 2 you are referring to the second plot. However, if we neglect the structure near the inlet and the outlet, we can reasonably assume that the flow within the channel bends will be identical between the unit cells. The results of the analysis, including the concentration and the mapped velocity field, are depicted below. Today, we will discuss General Extrusion operators, which are designed to handle nonlinear mappings and the mapping of variables between geometric entities of different dimensions. Data transfer between components is performed using the COMSOL built-in "General Extrusion" coupling operator, and the iterative study steps are controlled using "For" and "End For" nodes in COMSOL. Settings used to revolve data about the azimuthal axis of a cylindrical coordinate system. This can be useful for analysis; for example, to probe the solution at a point that is moving in time but is associated with a stationary geometry. In the Work plane list, select the work plane to extrude from. Extruding Data Along a Direction. In this model, a laser moves radially inwards and outwards over a silicon wafer that is rotating on its stage. For example, if the intermediate mesh is in 2D space, there is no z-expression field. Settings for the General Extrusion operator defined on the stator boundary. so we choose 0.6 to be on the safe side. For . However, if we want to use variables from a 2D axisymmetric component in the physics node of a 3D component (i.e., thermal expansion), we need to utilize General Extrusion operators. Select the faces that you want to extrude in the Graphics window. Adding a General Extrusion coupling operator.The green vector field is the transport term used to model the wafer rotation. listed if standards is not an option). (For reference: the model is approx. 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. Part 2: Mapping Variables with General Extrusion Operators - COMSOL Please feel free to contact us if you have any questions! It also provides design assistance and engineering support. We were the first North American aluminum extruder to achieve ISO 9002 Certification. We are then looking at the problem of evaluating the temperature at a point that follows the rotating wafer material. Posted 15 feb 2011, 16:18 UTC How to use the General Extrusion coupling operator to probe a solution at a moving point http://comsol.com/c/10mb Here is an interesting question: How can we easily probe the solution at a point that is moving in time, but associated with a stationary geometry?. I defined a general extrusion operator, then defined variables such as T_sf = genext1(comp1.T), Y_sf = genext1(Y) and so. The plot below shows the graph for temperature evaluated at a point located 0.5 inches from the center of the rotating disk: Using the General Extrusion Coupling Operator in COMSOL: Dynamic Probe Now, if desired, it is possible to model the entire device shown above. Your internet explorer is in compatibility mode and may not be displaying the website correctly. This is reasonable to do since it is assumed that the flow field is independent of the species concentration. Several cases are illustrated in the table below. The General Extrusion operator maps expressions defined on a source to an expression that can be evaluated on any destination geometry where the destination map expressions are valid. Mapping of data defined on a cross section (left) around an axis of symmetry and into a volume (right). This applies a varying species concentration over the inlet boundary. Thus, two extrusion operators are required. It contained both the high and low points for that academic semester; the lab portion was a lot of fun, learning about (read: playing with) the different soils and clays existing in the state of Georgia.