[Cleanup] Do not reuse the variable ell

src/sand-wedge.cc

@@ -200,8 +200,8 @@ int main(int argc, char *argv[]) {
                                   _relativeTime);
       _ell += gravityFunctional;
     };
-    Vector ell(leafVertexCount);
-    computeExternalForces(0.0, ell);
+    Vector ell0(leafVertexCount);
+    computeExternalForces(0.0, ell0);
 
     // {{{ Initial conditions
     using LinearFactory = SolverFactory<
@@ -237,7 +237,7 @@ int main(int argc, char *argv[]) {
     // Solve the stationary problem
     Vector u_initial(leafVertexCount);
     u_initial = 0.0;
-    solveLinearProblem(dirichletNodes, A, ell, u_initial, ANorm,
+    solveLinearProblem(dirichletNodes, A, ell0, u_initial, ANorm,
                        parset.sub("u0.solver"));
     Vector ur_initial(leafVertexCount);
     ur_initial = 0.0;
@@ -267,7 +267,7 @@ int main(int argc, char *argv[]) {
     Vector a_initial(leafVertexCount);
     a_initial = 0.0;
     {
-      // We solve Ma = ell - [Au + Cv + Psi(v)]
+      // We solve Ma = ell0 - [Au + Cv + Psi(v)]
       Vector accelerationRHS(leafVertexCount);
       {
         accelerationRHS = 0.0;
@@ -276,7 +276,7 @@ int main(int argc, char *argv[]) {
         // NOTE: We assume differentiability of Psi at 0 here!
         myGlobalFriction->addGradient(v_initial, accelerationRHS);
         accelerationRHS *= -1.0;
-        accelerationRHS += ell;
+        accelerationRHS += ell0;
       }
       solveLinearProblem(noNodes, M, accelerationRHS, a_initial, MNorm,
                          parset.sub("a0.solver"));
@@ -376,6 +376,7 @@ int main(int argc, char *argv[]) {
       timeSteppingScheme->nextTimeStep();
 
       auto const relativeTime = double(timeStep) / double(timeSteps);
+      Vector ell(leafVertexCount);
       computeExternalForces(relativeTime, ell);
 
       Matrix velocityMatrix;