Andrew Moa Blog Site

1. Fluent

First, write the Fluent jou script:

/file/read-case "small_fan.cas.h5" 
/solve/initialize/hyb-initialization 
/solve/iterate 100 
/file/write-case "small_fan_results.cas.h5" ok 
/file/write-data "small_fan_results.dat.h5" ok 
/exit ok 

This jou file is very simple. It tells Fluent which file to read, how to initialize, how many steps to iterate, and how to save until the final exit. If the calculation is more complicated, such as involving UDF loading or special condition initialization settings, you need to add corresponding command lines. If you are not familiar with how to write TUI commands, you can record scripts through the command line window under the Fluent graphical interface.

This paper uses different CFD solvers to verify the laminar flow problem. Verify the accuracy of each solver by listing the operating procedures and differences in the output results of different solvers.

1. Problem description

As shown in the figure below, a fixed-constant laminar flow model between two concentric cylinders is established. The flow is caused by the rotation of the inner cylinder at a constant angular velocity, while the outer cylinder remains stationary. Using periodic boundaries, only a portion of the basin needs to be modeled. The physical model and input data are shown in the following table.