structured quad mesh with transition zone - Computational Science

I wonder which software can be used to generate the mesh like below. Anybody has an idea?

A Level Set Model for Structured Mesh Representation of Fibrous Preforms used in Composites Manufacturing

A Level Set Model for Structured Mesh Representation of Fibrous Preforms used in Composites Manufacturing

JMSE, Free Full-Text

Encoding reprogrammable properties into magneto-mechanical materials via topology optimization

Applied Sciences, Free Full-Text

Computational Design and Optimisation of Quad Meshes Based on Diagonal Meshes

Demonstration of mesh features: a a structured quad mesh and an

A topology optimization algorithm for magnetic structures based on a hybrid FEM–BEM method utilizing the adjoint approach

Quadrangle: Mapping meshing algorithm — Mesh 9.12.0 documentation

Exploring and machine learning structural instabilities in 2D materials

JMSE, Free Full-Text