diff --git a/include/user_functions/SloshingTankVOFAuxFunction.h b/include/user_functions/SloshingTankVOFAuxFunction.h
new file mode 100644
index 0000000000..f71501de28
--- /dev/null
+++ b/include/user_functions/SloshingTankVOFAuxFunction.h
@@ -0,0 +1,47 @@
+// Copyright 2017 National Technology & Engineering Solutions of Sandia, LLC
+// (NTESS), National Renewable Energy Laboratory, University of Texas Austin,
+// Northwest Research Associates. Under the terms of Contract DE-NA0003525
+// with NTESS, the U.S. Government retains certain rights in this software.
+//
+// This software is released under the BSD 3-clause license. See LICENSE file
+// for more details.
+//
+
+#ifndef SloshingTankVOFAuxFunction_h
+#define SloshingTankVOFAuxFunction_h
+
+#include <AuxFunction.h>
+
+#include <vector>
+
+namespace sierra {
+namespace nalu {
+
+class SloshingTankVOFAuxFunction : public AuxFunction
+{
+public:
+  SloshingTankVOFAuxFunction(const std::vector<double>& params);
+
+  virtual ~SloshingTankVOFAuxFunction() {}
+
+  using AuxFunction::do_evaluate;
+  virtual void do_evaluate(
+    const double* coords,
+    const double time,
+    const unsigned spatialDimension,
+    const unsigned numPoints,
+    double* fieldPtr,
+    const unsigned fieldSize,
+    const unsigned beginPos,
+    const unsigned endPos) const;
+
+  double water_level_;
+  double amplitude_;
+  double kappa_;
+  double interface_thickness_;
+};
+
+} // namespace nalu
+} // namespace sierra
+
+#endif
diff --git a/src/LowMachEquationSystem.C b/src/LowMachEquationSystem.C
index cf362d0c46..425d1dbc1f 100644
--- a/src/LowMachEquationSystem.C
+++ b/src/LowMachEquationSystem.C
@@ -175,6 +175,8 @@
 #include <user_functions/PerturbedShearLayerAuxFunctions.h>
 #include <user_functions/GaussJetVelocityAuxFunction.h>
 
+#include <user_functions/DropletVelocityAuxFunction.h>
+
 // deprecated
 
 // stk_util
diff --git a/src/VolumeOfFluidEquationSystem.C b/src/VolumeOfFluidEquationSystem.C
index 7e5723e818..de312a543e 100644
--- a/src/VolumeOfFluidEquationSystem.C
+++ b/src/VolumeOfFluidEquationSystem.C
@@ -43,6 +43,7 @@
 #include "user_functions/ZalesakDiskVOFAuxFunction.h"
 #include "user_functions/ZalesakSphereVOFAuxFunction.h"
 #include "user_functions/DropletVOFAuxFunction.h"
+#include "user_functions/SloshingTankVOFAuxFunction.h"
 #include "ngp_utils/NgpFieldBLAS.h"
 #include "ngp_utils/NgpLoopUtils.h"
 #include "ngp_utils/NgpFieldUtils.h"
@@ -466,7 +467,7 @@ void
 VolumeOfFluidEquationSystem::register_initial_condition_fcn(
   stk::mesh::Part* part,
   const std::map<std::string, std::string>& theNames,
-  const std::map<std::string, std::vector<double>>& /* theParams */)
+  const std::map<std::string, std::vector<double>>& theParams)
 {
   // iterate map and check for name
   const std::string dofName = "volume_of_fluid";
@@ -520,6 +521,13 @@ VolumeOfFluidEquationSystem::register_initial_condition_fcn(
       }
     } else if (fcnName == "droplet") {
       theAuxFunc = new DropletVOFAuxFunction();
+    } else if (fcnName == "sloshing_tank") {
+      std::map<std::string, std::vector<double>>::const_iterator iterParams =
+        theParams.find(dofName);
+      std::vector<double> fcnParams = (iterParams != theParams.end())
+                                        ? (*iterParams).second
+                                        : std::vector<double>();
+      theAuxFunc = new SloshingTankVOFAuxFunction(fcnParams);
     } else {
       throw std::runtime_error("VolumeOfFluidEquationSystem::register_initial_"
                                "condition_fcn: limited functions supported");
diff --git a/src/user_functions/CMakeLists.txt b/src/user_functions/CMakeLists.txt
index 9c2e3dba7c..1d13dd8590 100644
--- a/src/user_functions/CMakeLists.txt
+++ b/src/user_functions/CMakeLists.txt
@@ -41,4 +41,5 @@ target_sources(nalu PRIVATE
    ${CMAKE_CURRENT_SOURCE_DIR}/ZalesakSphereMassFlowRateKernel.C
    ${CMAKE_CURRENT_SOURCE_DIR}/DropletVOFAuxFunction.C
    ${CMAKE_CURRENT_SOURCE_DIR}/DropletVelocityAuxFunction.C
+   ${CMAKE_CURRENT_SOURCE_DIR}/SloshingTankVOFAuxFunction.C
 )
diff --git a/src/user_functions/DropletVOFAuxFunction.C b/src/user_functions/DropletVOFAuxFunction.C
index b377ed0460..ae8fa2f9d1 100644
--- a/src/user_functions/DropletVOFAuxFunction.C
+++ b/src/user_functions/DropletVOFAuxFunction.C
@@ -44,7 +44,7 @@ DropletVOFAuxFunction::do_evaluate(
     fieldPtr[0] = 0.0;
     //fieldPtr[0] += -0.5 * (std::erf(y / interface_thickness) + 1.0) + 1.0;
 
-    auto radius = std::sqrt(x * x + (y) * (y) + z * z) - 0.075;
+    auto radius = std::sqrt(x * x + y * y + z * z) - 0.075;
     fieldPtr[0] += -0.5 * (std::erf(radius / interface_thickness) + 1.0) + 1.0;
 
     fieldPtr += fieldSize;
diff --git a/src/user_functions/SloshingTankVOFAuxFunction.C b/src/user_functions/SloshingTankVOFAuxFunction.C
new file mode 100644
index 0000000000..58ecea7fc9
--- /dev/null
+++ b/src/user_functions/SloshingTankVOFAuxFunction.C
@@ -0,0 +1,71 @@
+// Copyright 2017 National Technology & Engineering Solutions of Sandia, LLC
+// (NTESS), National Renewable Energy Laboratory, University of Texas Austin,
+// Northwest Research Associates. Under the terms of Contract DE-NA0003525
+// with NTESS, the U.S. Government retains certain rights in this software.
+//
+// This software is released under the BSD 3-clause license. See LICENSE file
+// for more details.
+//
+
+#include <user_functions/SloshingTankVOFAuxFunction.h>
+#include <algorithm>
+
+// basic c++
+#include <cmath>
+#include <vector>
+#include <stdexcept>
+#include <iostream>
+
+namespace sierra {
+namespace nalu {
+
+SloshingTankVOFAuxFunction::SloshingTankVOFAuxFunction(
+  const std::vector<double>& params)
+  : AuxFunction(0, 1),
+    water_level_(0.),
+    amplitude_(0.1),
+    kappa_(0.25),
+    interface_thickness_(0.1)
+{
+  // check size and populate
+  if (params.size() != 4 && !params.empty())
+    throw std::runtime_error("Realm::setup_initial_conditions: "
+                             "sloshing_tank requires 4 params: water level, "
+                             "amplitude, kappa, and interface thickness");
+  if (!params.empty()) {
+    water_level_ = params[0];
+    amplitude_ = params[1];
+    kappa_ = params[2];
+    interface_thickness_ = params[3];
+  }
+}
+
+void
+SloshingTankVOFAuxFunction::do_evaluate(
+  const double* coords,
+  const double /*time*/,
+  const unsigned spatialDimension,
+  const unsigned numPoints,
+  double* fieldPtr,
+  const unsigned fieldSize,
+  const unsigned /*beginPos*/,
+  const unsigned /*endPos*/) const
+{
+  for (unsigned p = 0; p < numPoints; ++p) {
+
+    const double x = coords[0];
+    const double y = coords[1];
+    const double z = coords[2];
+
+    const double z0 =
+      water_level_ + amplitude_ * std::exp(-kappa_ * (x * x + y * y));
+    fieldPtr[0] =
+      -0.5 * (std::erf((z - z0) / interface_thickness_) + 1.0) + 1.0;
+
+    fieldPtr += fieldSize;
+    coords += spatialDimension;
+  }
+}
+
+} // namespace nalu
+} // namespace sierra