Non-newtonian Carreau Fluid CFD Simulation, ANSYS Fluent Training
- Upon ordering this product, you will be provided with a geometry file, a mesh file, and an in-depth Training Video that offers a step-by-step training on the simulation process.
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€220.00 €110.00
One kind of complicated fluid that varies in viscosity according to the rate at which shear stress is applied is the non-Newtonian Carreau fluid. This fluid is named for Pierre Carreau, who created the model that explains its behavior. It has shear-thinning qualities, which means that as the shear rate increases, the fluid’s viscosity lowers. When it comes to describing the flow behavior of different materials, such as blood, some polymers, and specific food items, the Carreau model is beneficial. Compared to simpler models, it offers a more accurate picture of fluid behavior, particularly in scenarios where the fluid undergoes a wide variety of shear rates. The current study heavily relies on the reference paper entitled “ Using Euler-Lagrange Variational Principle to Obtain Flow Relations for Generalized Newtonian Fluids”.
Figure 1: Carreau fluid flow – Reference : https://doi.org/10.1016/j.csite.2018.03.001
Simulation Process
The initial model geometry is created. Then, it is divided into hexagonal cells, resulting in a structured grid using ICEM (45360 elements). Given the low Reynolds number, the flow regime constantly stays in the laminar range. The Fluent software itself has a Carreau viscosity model, which eases the definition of non-Newtonian Carreau fluids’ properties.
Post-processing
We can observe distinct flow characteristics based on the velocity and pressure contours of a Non-Newtonian Carreau fluid simulation that has been supplied. The velocity contour exhibits a parabolic profile reminiscent of pipe flow. The maximum velocities are located in the center (red), and the lowest velocities are near the walls (blue). This suggests the shear-thinning behavior of the Carreau fluid and the no-slip condition at the boundaries. The pressure contour exhibits a gradual decrease from left to right, under the specified pressure decline of 2598.9477 Pa. The flattened velocity profile in the center of the Carreau fluid, which is in contrast to the sharpened parabolic profile of Newtonian fluids, is indicative of its shear-thinning nature.
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