# Application Gallery

The Application Gallery features COMSOL Multiphysics® tutorial and demo app files pertinent to the electrical, structural, acoustics, fluid, heat, and chemical disciplines. You can use these examples as a starting point for your own simulation work by downloading the tutorial model or demo app file and its accompanying instructions.

Search for tutorials and apps relevant to your area of expertise via the Quick Search feature. To download the MPH-files, log in or create a COMSOL Access account that is associated with a valid COMSOL license. Note that many of the examples featured here can also be accessed via the Application Libraries that are built into the COMSOL Multiphysics® software and available from the File menu.

COMSOL Multiphysicsx

### From Surface Mesh to Geometry: STL Import of a Vertebra

This tutorial demonstrates how to import and create a geometry from a surface mesh saved in the STL format. The instructions detail how to remove isolated faces from the imported STL mesh, how to use the geometry import parameters, and how to create volumes for simulation both on the ... Read More

### Laser Heating of a Silicon Wafer with Ablation

When modeling a manufacturing process, such as the heating of an object, it is possible for irreversible damage to occur due to a change in temperature. This may even be a desired step in the process. With the *Previous Solution* operator, we can model such damage in COMSOL ... Read More

### Joule Heating of a Microactuator — Distributed Parameter Version

A model of a thermal microactuator requires the coupled simulation of electric current conduction with heat generation, heat conduction, and structural stresses and strains due to thermal expansion. The purpose of this model is to demonstrate how to access the cluster computing ... Read More

### Transmission Line Parameter Calculator

Transmission line theory is a cornerstone in the teaching of RF and microwave engineering. Transmission lines are used to guide waves of electromagnetic fields at radio frequencies. They exist in a variety of forms, many of which are adapted for easy fabrication and employment in ... Read More

### The Black-Scholes Equation

The Black-Scholes equation, computes the value u of a European stock option. Black-Scholes derived an analytical expression for the solution to this problem. However, the formula works only for certain cases; for instance, you cannot employ it when sigma and r are functions of x and t. ... Read More

### Creating a Random Geometry

Say you would like to simulate a natural material or an arrangement of parts that have some known statistical distribution of dimensional variations. In such cases, you can create a random geometry based on these variations. This model file is an example that demonstrates how to ... Read More

### Modeling Material Removal through Thermal Ablation

This example exemplifies how to model thermal ablation by taking into account material removal. A more detailed description of the phenomenon and the modeling process can be seen in the blog post "[Modeling Thermal Ablation for Material Removal](https://www.comsol.com/blogs/modeling-thermal-ablation-for-material-removal/) ... Read More