An open source adaptive mesh code is a computer program that allows for the creation and manipulation of a mesh, or grid, for use in numerical simulations. It is considered open source because the source code is freely available for anyone to view, modify, and distribute.
An adaptive mesh code uses algorithms to dynamically adjust the grid spacing in areas of interest, allowing for more accurate and efficient simulations. This is in contrast to traditional mesh codes, which use a fixed grid spacing throughout the entire simulation.
Using an open source adaptive mesh code allows for greater transparency and collaboration within the scientific community. It also allows for customization and improvements to be made by users, leading to more accurate and efficient simulations.
One limitation is that the code may not be user-friendly for those without a strong background in computer programming. Additionally, the accuracy and reliability of the simulations may depend on the skills and expertise of the user in properly implementing the code.
There are many open source adaptive mesh codes available online, including on websites such as GitHub, SourceForge, and CFD-Online. It is also common for researchers and institutions to make their own codes publicly available on their websites.