• To save only the data files, use the following TUI option:

file → auto-save → case-frequency → if-mesh-is-modified

This will result in the options in the When the Data File is Saved, Save the Case group box being disabled in the Autosave dialog box. In essence, this TUI command forces ANSYS Fluent to the save case file only when the mesh is modified. It does not disable case file saving, but reduces it to an absolute minimum. This is necessary to do so since you cannot read a data file without a case file containing a matching mesh.

• First-to-Higher Order Blending While the higher-order scheme may result in greater accuracy，it can also result in convergence diflcultes and instabilties at certain flow conditions.On the other hand，using a first-order scheme may not provide the desired accuracy.One approach to achieving improved accuracy while maintaining good stability is to use a discretization blending factor.This feature is available for both density-based and pressure-based solvers and can be invoked using the fllowing text command：
solve-→ set-→numerics 

Enter a value between 0 and 1 when asked for the blending factor:

1st-order to higher-order blending factor[min=0.0 一max=1.0]

A blending factor of 0 reduces the gradient reconstruction to a first-order discretization scheme，whereas 1 will recover high-order discretization A blending factor of less than 1（typically 0.75 or 0.5）will make the convective fluxes more difusive，which in some flow conditions can stabilie a solution that is otherwise unstable when the full higher-order discretization scheme is employed.

Important：Note that in order to use this feature effectively，make sure that one of the allowed higher order discretization schemes is selected for the desired variables in the Solution Methods task page.

• 有时候为了提高收敛速度和计算精度，可以使用求解数据的插值(先用稀疏网格进行计算导出数据，相当于对之后计算密网格的初始化)：

FLUENT中边界条件的重复使用

file/write-settings

Fluent中网格负体积部分标记

When not using tools such as LSF or SGE, a different checkpointing mechanism can be used when running an ANSYS FLUENT simulation. You can checkpoint an ANSYS FLUENT simulation while iterating/time-stepping, so that ANSYS FLUENT saves the case and data files and then continues the calculation, or so that ANSYS FLUENT saves the case and data files and then exits.

• Saving case and data files and continuing the calculation:
On Windows, create a file called check-fluent.txt, i.e.,
C:\temp\check-fluent.txt
• Saving case and data files and exiting ANSYS FLUENT:
On Windows, create a file called exit-fluent.txt, i.e.,
temp\exit-fluent.txt

The saved case and data files will have the current iteration number appended to their file names.

ANSYS FLUENT offers an alternate way to checkpoint an unsteady simulation. While the default behavior is to checkpoint the simulation at the end of the current iteration, for unsteady simulations you have the option of completing all of the iterations in the current time-step before checkpointing. This can be set by entering the following Scheme command prior to running the unsteady simulation:

(ckpt/time-step?#t)

Now when you save the checkpoint file (as described previously), the case and data file will be saved at the end of the current time-step and named accordingly. To switch back to the default checkpointing mechanism at the end of the current iteration, use the following Scheme command:

(ckpt/time-step?#f)
 Note that the(ckpt/time-step?#t)command will have the effect only in the case of an unsteady simulation.

To change the default location of the saved case and data files, you can use the following Scheme commands:

(set! checkpoint/check-filename pathname)

and

(set! checkpoint/exit-filename pathname)

where pathname is the path you wish to set as the new default location of the saved case and data files.

• 在TUI界面输入mesh/modify-zones/extrude-face-zone-delta，根据提示输入需延长的边界面的ID或名称并回车，然后根据提示输入每一段拉伸长度（单位m），每输入一个长度回车一次（不需再拉伸时不输长度直接回车），最终拉伸长度为每段之和。

变为：
• 在TUI界面输入mesh/modify-zones/extrude-face-zone-para，根据提示输入需延长的边界面的ID或名称并回车，然后输入需拉伸的总长度，回车后依次输入每一段的比例参数（比例参数从0一直到1，如0、0.1、0.2、……1，各段数字表示分别表示各段起点与拉伸起始面的距离占总长度的比例）。