navier_stokes_3d_exact

navier_stokes_3d_exact, a Fortran90 code which evaluates exact solutions to the incompressible time-dependent Navier-Stokes equations over an arbitrary domain in 3D.

The given velocity and pressure fields are exact solutions for the 3D incompressible time-dependent Navier Stokes equations over any region.

To define a typical problem, one chooses a bounded spatial region and a starting time, and then imposes boundary and initial conditions by referencing the exact solution appropriately.

In the Ethier reference, a calculation is made for the cube centered at (0,0,0) with a "radius" of 1 unit, and over the time interval from t = 0 to t = 0.1, with parameters a = PI/4 and d = PI/2, and with Dirichlet boundary conditions on all faces of the cube.

Licensing:

The information on this web page is distributed under the MIT license.

Languages:

navier_stokes_3d_exact is available in a C version and a C++ version and a Fortran90 version and a MATLAB version and an Octave version and a Python version.

Related Data and Programs:

navier_stokes_3d_exact_test

f90_exact, a Fortran90 code which evaluates exact solutions to a few selected examples of ordinary differential equations (ODE) and partial differential equations (PDE).

Reference:

  1. Martin Bazant, Henry Moffatt,
    Exact solutions of the Navier-Stokes equations having steady vortex structures,
    Journal of Fluid Mechanics,
    Volume 541, pages 55-64, 2005.
  2. Johannes Burgers,
    A mathematical model illustrating the theory of turbulence,
    Advances in Applied Mechanics,
    Volume 1, pages 171-199, 1948.
  3. C Ross Ethier, David Steinman,
    Exact fully 3D Navier-Stokes solutions for benchmarking,
    International Journal for Numerical Methods in Fluids,
    Volume 19, Number 5, March 1994, pages 369-375.

Source Code:

Last revised on 02 August 2020.