AcuProbe

AcuProbe is a real time solution checking module in AcuSolve.

During the process of solution you can track the solution behavior in terms of residual ratios. AcuProbe can be launched from AcuConsole by clicking Tools > AcuProbe.


Figure 1. AcuProbe

AcuProbe provides various statistics for tracking and plotting.

You can plot a particular variable by right-clicking and selecting Plot or can you can plot all of the variables in a category by right-clicking and selecting Plot All.

Data Types

Below is a description of the data types available in AcuProbe.
Run data
Contains the general simulation parameters such as Time, Time Increment, CPU Time and Elapsed Time.
Residual ratio
Contains the residual ratios for each of the flow parameters such as pressure, velocity, eddy viscosity and temperature. These ratios can be plotted with three different options Initial, Final and All,
Solution ratio
Contains the solution ratios for each of the flow parameters such as pressure, velocity, eddy viscosity and temperature. These ratios can be plotted with three different options Initial, Final and All.
Surface output
Contains surface integrated values of variables such as pressure, momentum, mass flux and wall shear stress.
Surface statistics
Contains the surface statistics of minimum and maximum of variables such as pressure, momentum, mass flux and wall shear stress.

Residual Types

Below is a description of the residual types that are available.
Initial
Provides the residual ratios at the start of each time step.
Final
Provides the residual ratios at the end of each time step.
All
Provides the residual ratios for all of the staggers within a time step.

Define a User-Defined Function

Apart from the variables provided by AcuProbe, you can define the specific variable not mentioned in AcuProbe by using the user-defined function (UDF).

To compute drag coefficient on a car body with a flow direction of x: D r a g c o e f f i c i e n t = T r a c t i o n x ( o n   c a r   b o d y ) 0.5 * r h o * U r e f 2 * A r e f .

To create the required UDF in AcuProbe:

  1. Click Edit > User-Function.
  2. In the Name field, enter cd.
  3. In the Function area, type as shown below.


    Figure 2. Definition of Drag Coefficient as UDF
  4. For getting x-traction on surface Body, right-click x_traction under Surface Output > Body and select copy name and paste it in the text area.
  5. Click Apply.
    AcuProbe will plot the value of Cd.
  6. The UDF can be saved by clicking Save so that it can be retrieved at a later time. Saved UDFs can be imported in AcuProbe by clicking File > Import Curve/UDF.