This macro will increase the distance between the trailing and leading vehicle and save reports and scenes.

drafting.java

/**
 * Design of Experiment
 * 
 * Requirement: MacroUtils v3, available at macrohut.cd-adapco.com
 * 
 * @author Pablo Fernandez (pfernandez@theansweris27.com)
 */

import java.io.*;
import macroutils.*;
import star.base.neo.*;
import star.base.report.Report;
import star.common.*;

public class drafting extends MacroUtils {
    public void execute() {
        _initUtils();
        runExperiment();
    }
    public void runExperiment() {
        // Data file for further postprocessing
        File file = new File(simPath + "_doe.csv");
        PrintWriter out = null;
        createFile(file, out);
        // Get boundaries
        Region rg = sim.getRegionManager().getRegion("Overset 2D");
        Units units = sim.getUnitsManager().getPreferredUnits(new IntVector(new int[] {0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}));
        // Loop
        for (Integer i=1; i<=40; i+=1) {
            clearSolution();
            float xL = i/10.0;
            // Set boundary values for velocity
            sim.getRepresentationManager().translateMesh(new NeoObjectVector(new Object[] {rg}), new DoubleVector(new double[] {0.1045, 0.0, 0.0}), new NeoObjectVector(new Object[] {units, units, units}), lab0);
            sim.getInterfaceManager().initialize();
            runCase(2); // run case
            report(file,out,String.format("%.1f;%s", xL, getDataStr()));
            String picture = String.format("\\Imagenes Doe\\%s_%02d",simTitle,i);
            hardCopyPictures(1280, 720, picture);
        }
    }
    void createFile(File file, PrintWriter out) {
        try {
            FileWriter fstream = new FileWriter(file, false); // true tells to append data.
            out = new PrintWriter(fstream);
            out.println("Spacing (x/L);Drag Lead (-);Lift Lead (-);Drag Trail (-);Lift Trail (-)");
        } catch (IOException e) {
            System.err.println("Error: " + e.getMessage());
        } finally {
            if(out != null) {
                out.close();
            }
        }
    }
    public void report(File file, PrintWriter out, String s) {
        try {
            FileWriter fstream = new FileWriter(file, true);
            out = new PrintWriter(fstream);
            out.println(s);
            out.close();
        } catch (IOException e) {
            System.err.println("Error: " + e.getMessage());
        }
    }
    String getDataStr() {
        Report rDrag = getReport("Drag Coefficient");
        Report rLift = getReport("Lift Coefficient");
        Report rDragTrail = getReport("Drag Coefficient Trail");
        Report rLiftTrail = getReport("Lift Coefficient Trail");
        String str = String.format("%f;%f;%f;%f",
                rDrag.getReportMonitorValue(),
                rLift.getReportMonitorValue(),
                rDragTrail.getReportMonitorValue(),
                rLiftTrail.getReportMonitorValue());
        return str;
    }
}