     /// Update activity of SPH particles.
     /// SPH particles which are in an active domain are set as active particles.
     /// For example, particles close to a rigid body.
-    virtual void UpdateActivity(std::shared_ptr<SphMarkerDataD> sphMarkersD1,
+    void UpdateActivity(std::shared_ptr<SphMarkerDataD> sphMarkersD1,
                                 std::shared_ptr<SphMarkerDataD> sphMarkersD2,
                                 std::shared_ptr<FsiBodiesDataD> fsiBodiesD,
                                 Real Time);
 
     /// Update SPH particles data.
     /// In an explicit formulation, the function relies on the explicit integration scheme.
-    virtual void UpdateFluid(std::shared_ptr<SphMarkerDataD> sphMarkersD, Real dT);
+    void UpdateFluid(std::shared_ptr<SphMarkerDataD> sphMarkersD, Real dT);
 
     /// Update SPH particles data.
     /// In an implicit formulation, the function relies on the implicit integration scheme.
-    virtual void UpdateFluid_Implicit(std::shared_ptr<SphMarkerDataD> sphMarkersD);
+    void UpdateFluid_Implicit(std::shared_ptr<SphMarkerDataD> sphMarkersD);
 
     /// The function applies periodic boundary to the normal SPH particles.
-    virtual void ApplyBoundarySPH_Markers(std::shared_ptr<SphMarkerDataD> sphMarkersD);
+    void ApplyBoundarySPH_Markers(std::shared_ptr<SphMarkerDataD> sphMarkersD);
 
     /// The function modify the velocity of BCE particles.
-    virtual void ApplyModifiedBoundarySPH_Markers(std::shared_ptr<SphMarkerDataD> sphMarkersD);
+    void ApplyModifiedBoundarySPH_Markers(std::shared_ptr<SphMarkerDataD> sphMarkersD);
 };
 
 /// @} fsi_physics

    /// used to to update the particles position, velocity, and density in
    /// time, the latter is used to update the pressure from an equation of
    /// state. In the implicit scheme, the pressures are updated instead of density.
    virtual void IntegrateSPH(
        std::shared_ptr<SphMarkerDataD> sphMarkersD2,  ///< Pointer SPH particle information at the second half step
        std::shared_ptr<SphMarkerDataD> sphMarkersD1,  ///< Pointer SPH particle information at the first half step
        std::shared_ptr<FsiBodiesDataD> fsiBodiesD,    ///< Pointer information of rigid bodies

    ChFluidDynamics(std::shared_ptr<ChBce> otherBceWorker,             ///< Pointer to the information of BCE particles
                    ChSystemFsi_impl& otherFsiSystem,                  ///< Pointer to the FSI system
                    std::shared_ptr<SimParams> otherParamsH,           ///< Pointer to the simulation parameters
                    std::shared_ptr<ChCounters> otherNumObjects,       ///< Pointer to the number of objects
                    TimeIntegrator otherIntegrator,                    ///< Integration type (only for ISPH)
                    bool verb                                          ///< verbose terminal output
    );
