CFD Online Discussion Forums - Need help with a macro

So you are using the torque value(s) from the report(s) to set the rotation rate of the region? Is there anything specific about the macro you had an issue with? Java can be intimidating at first if you're used to higher level programming (e.g., Matlab), but if you take the time to learn the basics it can be very helpful in STAR. I think you may want something more the like the psuedo-Java below.

Code:

// STAR-CCM+ macro: LiftAndDrag.java

package macro;



import java.util.*;



import star.common.*;

import star.base.neo.*;

import star.base.report.*;

import star.flow.*;



import star.base.report.Report;

import star.common.ImplicitUnsteadySolver;

import star.common.PhysicalTimeStoppingCriterion;

import star.common.Simulation;

import star.common.StarMacro;

import star.motion.MotionManager;

import star.motion.RotatingMotion;



public class LiftAndDrag extends StarMacro {



  private void execute0() {



        // Set up simulation and macro objects 

        Simulation mysim = getActiveSimulation();

        double theta;

        double resultant;

        double alpha;

    double RotationRate;

        double timeStep;

        

        rotation = (RotatingMotion) mysim.get(MotionManager.class).getObject("Rotation");                        

        RotationRate = rotation.getRotationRate().getValue();

        timeStep = ((ImplicitUnsteadySolver) mysim.getSolverManager().getSolver(ImplicitUnsteadySolver.class)).getTimeStep().getValue();

        theta=((RotationRate*timestep)+theta);

        resultant=((((((sin(theta))-(RotationRate*cos(theta)))^2)-((((cos(theta))-(RotationRate*sin(theta)))^2))^(1/2))));

        Alpha=asin(((RotationRate)*sin(theta))/(resultant)); 

        

        // and so on

        

        // Running loop

        while (SimulationTime < TimeLimit) {

        

                // Run one iteration

        

                // Check report values

                

                // assign rotation rate

  }

}

Have you considered using a 6-DOF Rotation model instead?