So, we're talking about the steps to form a design in COMSOL. And after a hazy discussion, we were left with 2 subnodes; Component & Study in the Model Tree. The immense significance of these 2 nodes calls for a separate discussion. Don't you think so? Let's first talk about the Study!
According to our early discussion, we know that the Study sets up the solver type (i.e. Stationary, Time-dependent, Frequency-dependent, etc.).
Model Wizard automatically creates the nodes under Study while simulation. Additional studies can be added from the study tab from the Ribbon.
So, we can switch between different studies and compute. Each study has a Compute button to run simulation for the selected study. The settings & boundary mode operations and configurations can be set here. It is very much important to simulate the model with the correct study. The result nodes will be added as per the selected study.
Coming to the Components node, it comprises of multiple sections as;
✦ Definitions: Defines the variables, boundaries, system selections, and their modifications.
✦ View: It gives the axes settings.
✦ Geometry: Gives the necessary options to build the model.
✦ Materials: Materials property like refractive index and others can be specified here. You can also add material in this node.
✦ Mesh: The whole model is divided into numerous small nonoverlapping elements. The behavior model is approximated by assembling all the elements' behavior. As COMSOL is based on the Finite Element Method (FEM), it is highly dependent on meshing. Here we can select the mesh type (rectangular, triangular, square, etc.), their size, and the relative setups.
✦ Physics: Gives selection options based on the selected Physics.
✦ Variables: Numbers, parameters, built-in constants, unary and binary operators can be set as Global or Local variable. Variables are listed under the Definition tab. Too many variables can be grouped together using the Node Group feature.
In the next segment, we will try to design a model. Till then explore & learn. Keep in mind, software can't be taught by articles. These articles are to provide a guide. One has to learn the software by exploring it.
And be with us for the next article and yes don't forget to check out the tutorial video: A simple Model in COMSOL Multiphysics on youtube.
Image Source:
* COMSOL Multiphysics
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