diff --git a/src/main/java/neqsim/processSimulation/processEquipment/util/NeqSimUnit.java b/src/main/java/neqsim/processSimulation/processEquipment/util/NeqSimUnit.java
index 87af34311..161b84bef 100644
--- a/src/main/java/neqsim/processSimulation/processEquipment/util/NeqSimUnit.java
+++ b/src/main/java/neqsim/processSimulation/processEquipment/util/NeqSimUnit.java
@@ -26,7 +26,7 @@ public class NeqSimUnit extends TwoPortEquipment {
   private String equipment = "pipeline";
   String flowPattern = "stratified";
   private double length = 1.0;
-  public int numberOfNodes = 100;
+  public int numberOfNodes = 10;
   private double ID = 0.5;
   private double outerTemperature = 283.15;
   public double interfacialArea = 0.0;
@@ -87,11 +87,11 @@ public void run(UUID id) {
   public void runDroplet() {
     PipeData pipe1 = new PipeData(getID(), 0.00025);
     FlowNodeInterface test = new DropletFlowNode(thermoSystem, pipe1);
-    test.setInterphaseModelType(1);
+    test.setInterphaseModelType(0);
     test.setLengthOfNode(getLength() / (numberOfNodes * 1.0));
     test.getGeometry().getSurroundingEnvironment().setTemperature(getOuterTemperature());
 
-    test.getFluidBoundary().setHeatTransferCalc(false);
+    test.getFluidBoundary().setHeatTransferCalc(true);
     test.getFluidBoundary().setMassTransferCalc(true);
     double length = 0;
     test.initFlowCalc();
diff --git a/src/test/java/neqsim/processSimulation/processSystem/MassTransferTest.java b/src/test/java/neqsim/processSimulation/processSystem/MassTransferTest.java
new file mode 100644
index 000000000..3e3f88c66
--- /dev/null
+++ b/src/test/java/neqsim/processSimulation/processSystem/MassTransferTest.java
@@ -0,0 +1,51 @@
+package neqsim.processSimulation.processSystem;
+
+import org.junit.jupiter.api.Test;
+import neqsim.processSimulation.processEquipment.mixer.StaticPhaseMixer;
+import neqsim.processSimulation.processEquipment.stream.Stream;
+import neqsim.thermo.system.SystemInterface;
+import neqsim.thermo.system.SystemSrkEos;
+
+public class MassTransferTest extends neqsim.NeqSimTest {
+
+  @Test
+  public void runProcess() throws InterruptedException {
+    SystemInterface thermoSystem = new SystemSrkEos(273.15 + 15, 60.0);
+    thermoSystem.addComponent("nitrogen", 0.01);
+    thermoSystem.addComponent("CO2", 0.019);
+    thermoSystem.addComponent("methane", 0.925);
+    thermoSystem.addComponent("ethane", 0.045);
+    thermoSystem.setMixingRule("classic");
+
+    SystemInterface ethaneSystem = ((SystemInterface) thermoSystem).clone();
+    ethaneSystem.setMolarComposition(new double[] {0, 0, 0, 1.0});
+
+    Stream feedStream = new Stream("feed stream", thermoSystem);
+    feedStream.setFlowRate(10.0 * 24, "MSm3/day");
+
+    Stream ethaneStream = new Stream("ethane stream", ethaneSystem);
+    feedStream.setFlowRate(200000.0, "kg/hr");
+
+    StaticPhaseMixer mainMixer = new StaticPhaseMixer("gas ethane mixer");
+    mainMixer.addStream(feedStream);
+    mainMixer.addStream(ethaneStream);
+
+    neqsim.processSimulation.processEquipment.util.NeqSimUnit pipeline =
+        new neqsim.processSimulation.processEquipment.util.NeqSimUnit(mainMixer.getOutletStream(),
+            "pipeline", "stratified");
+    pipeline.setLength(0.1);
+    pipeline.setID(1.0);
+
+    neqsim.processSimulation.processSystem.ProcessSystem operations =
+        new neqsim.processSimulation.processSystem.ProcessSystem();
+    operations.add(feedStream);
+    operations.add(ethaneStream);
+    operations.add(mainMixer);
+    operations.add(pipeline);
+
+    operations.run();
+
+    pipeline.getOutletStream().getFluid().prettyPrint();
+
+  }
+}