Preparing the Scenes for Visualization

Here, you create a user-defined field function that calculates the pressure fluctuations. You visualize the calculated field on a pre-defined plane section that cuts through the origin. You write the pressure fluctuations scene to image files after each time-step. Additionally, you create a scene that displays the sponge layer damping coefficient on the plane section.

The pressure fluctuation is calculated as:

p^{'} = p - \bar{p}

where $p$ is the pressure and $\bar{p}$ is the pressure averaged over Region_1.

To prepare the scenes for visualization:

Obtain the average value of pressure in Region_1:

Right-click the Monitors node and select New Monitors > Field Mean.

Select the Monitors > Field Mean 1 node and set the following properties:


Property	Setting
Parts	Region_1
Field Function	Pressure

Create a field function that calculates the pressure fluctuations:

Right-click the Automation > Field Functions node and select New > Scalar.
Rename the User Field Function 1 node as p'.

Select the p' node and set the following properties:


Property	Setting
Function Name	pPrime
Dimensions	In the Dimensions dialog, set Pressure = 1
Definition	${Pressure}-${FieldMean1Monitor}

Create a scalar scene that displays the pressure fluctuations on the pre-defined plane section:

Right-click the Scenes node and select New > Scalar.
Rename the scene to Pressure Fluctutations.
Expand the Pressure Fluctuations node and delete the Outline 1 node.

Edit the Pressure Fluctuations node and set the following properties:


Node	Property	Setting
Scalar 1	Contour Style	Smooth Filled
Parts	Parts	Derived Parts > Plane Section
Scalar Field	Function	p'
	Clip	Off
	Min	-1.0
	Max	1.0
Color Bar	Color Map	cool-warm

Select the Tools > Annotations > Solution Time node and drag and drop it onto the Graphics window.

To write the scene to image files, select the Pressure Fluctuations > Attributes > Update node and set the following properties:


Property	Setting
Trigger	Time Step
Output Directory	images
Save to File	On

Create a scalar scene that displays the sponge layer damping coefficient:

Right-click the Scenes node and select New > Scalar.
Rename the scene to Sponge Layer Damping Coefficient.

Edit the Sponge Layer Damping Coefficient node and set the following properties:


Node	Property	Setting
Scalar 1	Contour Style	Smooth Filled
Parts	Parts	Derived Parts > Plane Section
Scalar Field	Function	Sponge Layer Damping Coefficient
Color Bar	Color Map	cool-warm

Save the simulation.