To visualize streamlines in STAR-CCM+, you will:
In this example, the streamline derived part will first be set up so that it shows the recirculating flow behind the blunt body, and will then be modified to show streamlines over the blunt body.
To create the new scene, right-click on the Scenes node, and select New Scene > Geometry.
To create the streamline derived part, right-click on the Derived Parts node and select New Part > Streamline... in the bluntBody window.
As with the plane section earlier, a new interactive in-place dialog will appear in the Graphics window associated with the newly created scene.
The entire fluid region will be used as the input part for the streamline part. Click on the Input Parts button and in the Select Objects dialog, make sure that subdomain-1 is the only part in the Selected list. Click Close in the Select Objects dialog.
In the Vector Field group box, make sure that Velocity is selected in the drop-down list. For the seed mode, select Point Seed.
To position the seed point just after the back of the blunt body (in the direction of flow), enter the following coordinates under Seed Position: 0.05 for X, 0.01 for Y and 0.01 for Z. Then enter 0.002 for Seed Radius and 10 for Number of Points.
Leave other settings at their defaults. Click Create to generate the streamlines.
The streamlines will be generated and shown in the display (this may take a few seconds).
In the bluntBody window, a new streamline node will appear in the Derived Parts node.
Click Close in the interactive in-place dialog.
A new streamline displayer has been added to the scene. Open the Displayers node and select the new Streamline Stream 1 node to edit the displayer properties.
In the Properties window, modify the displayer to customize how the streamlines will appear.
In the display, right-click on the color bar and select Velocity: Magnitude.
Since, by default, boundaries are displayed with a color reflecting the boundary type, the streamlines may be difficult to see. Change the color of all the boundaries in the scene by selecting the Geometry 1 node.
Then set Color Mode to Constant in the drop-down list in the Properties window.
You will now fine-tune the streamline derived part. Open the Derived Parts node and select the streamline node.
In the Properties window, make sure that Rotation Scale is 1.0.
Open the streamline node and select the RK2 node.
Set the Integration Direction property to Both so that the streamlines will be generated both upstream and downstream.
In the Expert properties:
The modified streamlines can be seen in the display.
The next step involves moving the seed point of the streamline derived part to the front of the blunt body. Select the RK2 node again. In the Properties window, change Integration Direction to Forward. Now select the Point Seed node, also within the streamline node.
Change the x-value of the Center property to -0.05, so that the property's value is -0.05, 0.01, 0.01.
The modified streamlines will appear in the display.
Save the simulation.
