Virtual Marine Arsenal

CFDShip-Iowa solves the incompressible Reynolds-averaged Navier-Stokes and continuity equations with a variety of turbulence models, and a single-phase level set method to accommodate free surface problems. Since it has been specifically developed for surface-ship and marine-propulsor flow problems, it has an array of ship hydrodynamic specific subroutines and post-processors.

The FrontFlow/blue (FFB) is a finite element method solver for incompressible turbulent flows by LES and RANS with second-order accuracy in terms both of time and space. Standard Smagorinsky model (SSM) and dynamic Smagorinsky model (DSM) are implemented for the SGS model, and SA model is implemented for RANS.

Crank-Nicolson method and fractional step (FS) method are implemented to solve the momentum equations and the pressure Poisson equation, respectively. FFB runs in massively parallel by the domain decomposition method.

Flotilla is a computer workbench that can be used for investigations into some aspects of ship hydrodynamics. Flotilla is not suitable for many classes of hulls. It cannot handle planing hulls or very stubby vessels like tugboats. However, it provides very acceptable predictions for hulls with L/B as low as 5 when the hull has a transom stern.

FREEPAN is the free surface module of NEWPAN that provides a capability to predict the unsteady, fully nonlinear response of a free surface to the unsteady motion of a floating or submerged body.

FreSCo+ is a Free Surface RANS code for maritime applications such as; wave resistance predictions, ship wake predictions, ship dynamic behavior in waves, maneuvering predictions, and propeller flows incl. cavitation.

Icare is a 6 degrees of freedom free surface Navier-Stokes solver, dedicated to the calculation of ship resistance and powering, ship added resistance in waves, seakeeping and maneuverability.

Integrated Hydrodynamics Design Environment (IHDE) is a tool which developed by NSWCCD to execute analyses of alternatives for dozens of ship concept options quickly with reasonable accuracy by combined resistance and seakeeping predictions. IHDE is available for use on US Government projects only.

Mchl is a software for calculating the wave making resistance considering an effect of the gradient of hull form in the depth direction based on linear approximation, which is made by modifying the original Michell’s thin ship formulation and by using Havelock’s Green function.

Michlet is a computer workbench that can be used for investigations into some aspects of ship hydrodynamics. Although it is not a ship design program, Michlet can be used for preliminary design work such as estimating the resistance, wave elevation patterns and bottom pressure signatures of monohulls, multihulls and submarines.

NavyFOAM is an OpenFOAM derivative specially tailored and customized for broad range of hydrodynamic studies by  NSWCCD for use on US Government projects and the code is not being redistributed. It possibly contains some new schemes and models mainly for VOF. The hydrodynamic interests are powering, propulsion, propulsor inflow, maneuvering and seakeeping computations.

NFA (Numerical Flow Analysis) is a fortran code and solves the Navier-Stokes equations utilizing a Cartesian grid cut-cell formulation with a second-order accurate, volume-of-fluid (VOF) interface-capturing technique to model the unsteady flow of air and water around moving bodies.

Turbulence is modeled with an implicit subgrid-scale model that is built into the treatment of the convective terms in the momentum equations. A domain decomposition method is used to distribute portions of the solution domain over a large number of processors.

Reva is a potential flow solver capable of computing wave resistance and the wave field of a ship with appendages by linear free surface model.

The integrated design environment of Shipflow package allows the designers to investigate and optimize the flow around appended hulls. The solver featuring overlapping grids technique can be controlled from a graphical interface that includes also optimization tools.