PID Controller Exercise 7— Analyzing Results
This exercise describes how the results are analyzed during and after the simulation. To hide CAD surfaces (not the fluid domain), switch between 
CAD Bodies and 
Flow Analysis Bodies in the Show group. Clear any variable display by selecting No Selection in the Legend drop-down. Click
XYPlot Panel to view the XY Plot.
CAD Bodies and Flow Analysis Bodies in the Show group. Clear any variable display by selecting No Selection in the Legend drop-down. Click XYPlot Panel to view the XY Plot. | 1. To show/hide selected geometric entities, click  Show in View Panel.2. To change the color scheme, click on  More in the Legend and select between Blue Red and Blue Purple. |
Viewing the Temperature Contour
1. Under Domains, select PIPE_BODY_1. In the View panel, click Show to display the selected domains.
Show to display the selected domains.2. In the Properties panel, View tab, for Surface, set values for the options as listed below:
◦ Grid—
◦ Outline—No
◦ Variable—Temperature:[Heat]
◦ Min—20 C
◦ Max—50 C
Plotting the Control Variable
1. In the Project Tree, under the Physics, select Controller.
2. In the Post-Processing Tab, click XYPlot. A new entity xyplot1 is added in the Flow Analysis Tree under Results > XY Plots.
XYPlot. A new entity xyplot1 is added in the Flow Analysis Tree under Results > XY Plots.3. Select xyplot1.
4. In the Properties panel, set Variable—[Controller] Control Variable
5. Click OK.
Plotting the Error
Plotting the Error
The error value at outlet is monitored to check error value at each iteration, which is reducing with desired set point value.
1. In the Project Tree, under the Physics, select Controller.
2. In the Post-Processing Tab, click XYPlot. A new entity xyplot2 is added in the Flow Analysis Tree under Results > XY Plots.
XYPlot. A new entity xyplot2 is added in the Flow Analysis Tree under Results > XY Plots.3. Select xyplot2.
4. In the Properties panel, set Variable—[Controller] Error
5. Click OK.
Plotting the Outlet Temperature
1. In the Flow Analysis Tree, under Boundary Conditions, click General Boundaries. Select pipe_outlet.
2. In the Post-Processing Tab, click XYPlot. A new entity xyplot3 is added in the Flow Analysis Tree under Results > XY Plots.
XYPlot. A new entity xyplot3 is added in the Flow Analysis Tree under Results > XY Plots.3. Select xyplot3.
4. In the Properties panel, set Variable—[Heat] Temperature from the Variable drop-down list.
5. Click OK.
Plotting the Volumetric Flux at Hot fluid Inlet
1. In the Flow Analysis Tree, under Boundary Conditions, click General Boundaries. Select pipe_hot_inlet.
2. In the Post-Processing Tab, click XYPlot. A new entity xyplot4 is added in the Flow Analysis Tree under Results > XY Plots.
XYPlot. A new entity xyplot4 is added in the Flow Analysis Tree under Results > XY Plots.3. Select xyplot4.
4. In the Properties panel, set Variable—[Flow] Volumetric Flux from the Variable drop-down list. Change the units to L/min.
Viewing the Streamlines in the Domain
Streamlines track the path of fluid flow.
1. To create streamlines, select Stream Lines from the Post-processing group in the Flow Analysis ribbon.
2. To release streamlines from the inlet boundaries, Select Yes under value for pipe_cold_inlet and pipe_hot_inlet.
3. Select Geometry under > > > in the Flow Analysis Tree.
4. In the Properties panel, Model tab, set values for the options as listed below:
◦ Line Thickness— 0.0002 m
◦ Animation Time Size— 0.05
5. In the Properties panel, View tab, for Surface, select the following values for the options listed:
◦ Variable— Temperature: [Heat]
◦ Max— 50 C
◦ Min— 20 C
6. In the Properties panel, Model tab for Streamline, set the following:
◦ Release Particle— Yes
Streamlines – Temperature
