In general, the finer the mesh the better the accuracy of the results.

A finer mesh in a simulation typically leads to better accuracy because it allows for a more detailed representation of the geometry being analyzed and provides greater resolution of the physical phenomena occurring within the model. When the mesh is refined, each element of the mesh becomes smaller, capturing the variations in the solution more effectively, particularly in areas with high gradients or complex geometrical features.

For instance, if analyzing stress distribution around a sharp corner in a part, a finer mesh can help capture the stress concentration more accurately than a coarser mesh, which may overlook critical variations. However, while a finer mesh generally improves accuracy, it also increases computational costs and time. Therefore, it is essential to find a balance between accuracy and computational efficiency.

In summary, a finer mesh enhances the resolution of the simulation, which is fundamental in obtaining accurate and reliable results in engineering analyses.