What happens to the element size during the process of h-adaptive meshing?

During h-adaptive meshing, the element sizes within the mesh are dynamically adjusted based on the solution's needs, particularly in areas where the solution exhibits greater error or complexity. This process involves refining the mesh by decreasing the element size in regions that are identified as error-prone or where more detail is required to accurately capture the physics of the problem.

Refining the mesh in these critical areas allows for more accurate results without necessarily making the entire model excessively fine, which would increase computational costs. By focusing on regions where higher accuracy is needed, h-adaptive meshing optimizes the mesh quality and leads to a more efficient simulation process. This targeted refinement is essential for obtaining reliable solutions while maintaining computational efficiency.

In contrast, other options suggest a uniform treatment across the model or an approach that does not respond to the needs of the simulation, which does not align with the principles of h-adaptive meshing.