Ansys Fluent – Scaling the Mesh

Written by cfd.ninja

March 10, 2020

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Source: Ansys

Internally, ANSYS FLUENT stores the computational mesh in meters, the SI unit of length. When mesh information is read into the solver, it is assumed that the mesh was generated in units of meters. If your mesh was created using a different unit of length (inches, feet, centimeters, etc.), you must scale the mesh to meters. To do this, you can select from a list of common units to convert the mesh or you can supply your own custom scale factors. Each node coordinate will be multiplied by the corresponding scale factor.

Scaling can also be used to change the physical size of the mesh. For instance, you could stretch the mesh in the $x$ direction by assigning a scale factor of 2 in the $x$ direction and 1 in the $y$ and $z$ directions. This would double the extent of the mesh in the $x$ direction. However, you should use anisotropic scaling with caution, since it will change the aspect ratios of the cells in your mesh.

In this tutorial tyou will learn how to scale the mesh using Ansys Fluent. Changing units in geometries is a very recurring error before starting the simulation. In this tutorial you can scale your mesh without modifying your geometry.

Tutorial: Polyhedral Mesh using ANSYS Fluent.

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