diff --git a/src/main/c/fluidsim.c b/src/main/c/fluidsim.c
index bfa5a32..9ace5f7 100644
--- a/src/main/c/fluidsim.c
+++ b/src/main/c/fluidsim.c
@@ -230,6 +230,23 @@ JNIEXPORT void JNICALL Java_electrosphere_FluidSim_simulate(
             tmpObj = currentChunk->jw;
             currentChunk->jw = currentChunk->jw0;
             currentChunk->jw0 = w;
+
+            float * tmpArr;
+            for(int j = 0; j < 27; j++){
+                tmpArr = currentChunk->u[j];
+                currentChunk->u[j] = currentChunk->u0[j];
+                currentChunk->u0[j] = tmpArr;
+            }
+            for(int j = 0; j < 27; j++){
+                tmpArr = currentChunk->v[j];
+                currentChunk->v[j] = currentChunk->v0[j];
+                currentChunk->v0[j] = tmpArr;
+            }
+            for(int j = 0; j < 27; j++){
+                tmpArr = currentChunk->w[j];
+                currentChunk->w[j] = currentChunk->w0[j];
+                currentChunk->w0[j] = tmpArr;
+            }
         }
         //copy neighbors
         for(int i = 0; i < numChunks; i++){
@@ -468,6 +485,23 @@ JNIEXPORT void JNICALL Java_electrosphere_FluidSim_simulate(
             tmpObj = currentChunk->jw;
             currentChunk->jw = currentChunk->jw0;
             currentChunk->jw0 = w;
+
+            float * tmpArr;
+            for(int j = 0; j < 27; j++){
+                tmpArr = currentChunk->u[j];
+                currentChunk->u[j] = currentChunk->u0[j];
+                currentChunk->u0[j] = tmpArr;
+            }
+            for(int j = 0; j < 27; j++){
+                tmpArr = currentChunk->v[j];
+                currentChunk->v[j] = currentChunk->v0[j];
+                currentChunk->v0[j] = tmpArr;
+            }
+            for(int j = 0; j < 27; j++){
+                tmpArr = currentChunk->w[j];
+                currentChunk->w[j] = currentChunk->w0[j];
+                currentChunk->w0[j] = tmpArr;
+            }
         }
         //copy neighbors
         for(int i = 0; i < numChunks; i++){