[Technical Column] Viscosity Models in OpenFOAM

OpenFOAM has its source code publicly available! It can be used with incorporated time-dependent viscous models and more!

This column introduces "Viscosity Models in OpenFOAM." Fluids like water and air have the characteristic that shear stress is proportional to shear rate. Such fluids are called Newtonian fluids. The proportionality constant in this case is viscosity, which is an intrinsic property of the fluid. On the other hand, in non-Newtonian fluids such as blood, clay, and whipped cream, this proportional relationship does not hold. For example, the viscosity of blood does not increase with shear rate; rather, it decreases as the shear rate increases. OpenFOAM provides a variety of viscosity models for non-Newtonian fluids in addition to those for Newtonian fluids. For more details, please refer to the related links. We encourage you to read it. *The detailed content of the column can be viewed through the related links. For more information, please feel free to contact us.

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