Analyzing > Using Parts > Working with Streamlines > Working with Runge-Kutta Objects > Using RK45

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Using RK45

The RK45 node, with its own properties, is automatically added as a subnode of a specific streamline derived part node when Adaptive-Step RK is specified for the Integration Solver property of the streamline. It is also the streamline integrator for the constrained streamline.

RK45 Properties

Integration Direction

Specifies the direction of integration from the seed location.

 

Forward

The integration proceeds in the forward direction (for instance with the flow if velocity is the vector field).

 

Backward

The integration proceeds in the backward direction (for instance against the flow if velocity is the vector field).

 

Both

The integration proceeds both forward and backward from the seed location.

     

RK45 Expert Properties

Initial Integration Step

The initial integration step size in units of cell length.

     

Maximum Error

The maximum allowable error in integration before step size is adjusted.

     

Maximum Integration Step

The maximum integration step size in units of cell length.

     

Maximum Propagation

The maximum length of the streamlines in units of cell length.

     

Max Steps

The maximum number of integration steps.

     

Minimum Integration Step

The minimum integration step in units of cell length.

     

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