diff --git a/src/simulation/Simulation.h b/src/simulation/Simulation.h
index 29981d4..280a10d 100644
--- a/src/simulation/Simulation.h
+++ b/src/simulation/Simulation.h
@@ -68,6 +68,13 @@ namespace sim {
              */
             void simulate();
 
+            /**
+             * @brief Calculate and set new state of the continuous fluid simulation. Move mixture positions and create new mixtures if necessary.
+             * 
+             * @param timeStep Time step in s for which the new mixtures state should be calculated.
+             */
+            void calculateNewMixtures(InstantaneousMixingModel<T>* model, double timeStep);
+
             /**
              * @brief Print the results as pressure at the nodes and flow rates at the channels
             */
diff --git a/src/simulation/Simulation.hh b/src/simulation/Simulation.hh
index d40ff79..3bc45f4 100644
--- a/src/simulation/Simulation.hh
+++ b/src/simulation/Simulation.hh
@@ -76,6 +76,10 @@ namespace sim {
                 // compute nodal analysis again
                 std::cout << "[Simulation] Conduct nodal analysis " << 0 <<"..." << std::endl;
                 pressureConverged = nodal::conductNodalAnalysis(this->network);
+                
+                if (PLATFORM == ORGAN) {
+                    calculateNewMixtures();
+                }
 
             }