# AcuProbe

AcuProbe is a real time solution checking module in AcuSolve.

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

- 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

- 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: $Dra{g}_{coefficient}=\frac{Tractio{n}_{x}\left(oncarbody\right)}{0.5*rho*{U}_{ref}^{2}*{A}_{ref}}$.

To create the required UDF in AcuProbe: