The constrained streamline part is a particle trace which is constrained to lie in a surface. A constrained streamline part's node has its own properties and pop-up menu, and is contained in the Derived Parts node of the simulation object tree.
With a constrained streamline, an effect similar to that of oil streaks can be obtained. STAR-CCM+ allows the creation of a streamline part from parent parts consisting of boundaries, and other parts which represent surfaces such as sections. A constrained streamline part has a seed object which defines the particle seed points.
Constrained streamlines are calculated using a fourth-order adaptive Runge-Kutta integration, accessible through an RK node in the object tree, and can integrate both forward and backward. The integration is controlled by the Maximum Propagation property, which specifies the maximum length of the streamline in units of cell-length, and the Max Steps property which specifies the maximum number of steps to execute in the integration. A constrained streamline will terminate when either of these criteria are met. A constrained streamline may also terminate because it exited the domain, or entered a stagnation region. Since the integrator is adaptive, it will adjust the step-size during the integration to keep the error below a certain threshold.
You can use the properties listed below to adjust the specifications of the constrained streamline.
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Selects the input part(s) as the source for deriving this constrained streamline. |
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Specifies how the seed point will be clustered and located. |
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| Point |
Uses a single point or a cloud of points as the seed. This causes a point seed node to be added as a subnode. |
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| Line |
Uses a line of points as the seed. This causes a line seed node to be added as a subnode. |
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| Part |
The surface, line or point part that will used to seed the streamlines. The number of lines generated will depend on setting in the part seed node that gets added as a subnode. |
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Specifies the integration solver. Only the |
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| Adaptive-Step RK |
Selects the adaptive streamline integrator. |
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Executes the define constrained streamline action allowing you to set the properties of this part interactively. This will only be available if a scene is open. |
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See also: common menu items.
