jburkardt

BURGERS_SOLUTION\ Exact Solutions of Time Dependent 1D Viscous Burgers Equation {#burgers_solution-exact-solutions-of-time-dependent-1d-viscous-burgers-equation align=”center”} =============================================================

BURGERS_SOLUTION is a C++ library which evaluates exact solutions of the time-dependent 1D viscous Burgers equation.

The form of the Burgers equation considered here is:

        du       du        d^2 u
        -- + u * -- = nu * -----
        dt       dx        dx^2

for -1.0 < x < +1.0, and 0.0 < t.

Licensing: {#licensing align=”center”}

The computer code and data files described and made available on this web page are distributed under the GNU LGPL license.

Languages: {#languages align=”center”}

BURGERS_SOLUTION is available in a C version and a C++ version and a FORTRAN77 version and a FORTRAN90 version and a MATLAB version and a Python version.

Related Data and Programs: {#related-data-and-programs align=”center”}

BURGERS, a dataset directory which contains 40 solutions of the Burgers equation in one space dimension and time, at equally spaced times from 0 to 1, with values at 41 equally spaced nodes in [0,1];

FD1D_BURGERS_LAX, a C++ program which applies the finite difference method and the Lax-Wendroff method to solve the non-viscous Burgers equation in one spatial dimension and time.

FD1D_BURGERS_LEAP, a C++ program which applies the finite difference method and the leapfrog approach to solve the non-viscous Burgers equation in one spatial dimension and time.

Reference: {#reference align=”center”}

1. Claude Basdevant, Michel Deville, Pierre Haldenwang, J Lacroix, J Ouazzani, Roger Peyret, Paolo Orlandi, Anthony Patera,\ Spectral and finite difference solutions of the Burgers equation,\ Computers and Fluids,\ Volume 14, Number 1, 1986, pages 23-41.

Source Code: {#source-code align=”center”}

• burgers_solution.cpp, the source code.
• burgers_solution.hpp, the include file.

Examples and Tests: {#examples-and-tests align=”center”}

• burgers_solution_prb.cpp, a sample calling program.
• burgers_solution_prb_output.txt, the output file.
• burgers_solution_test01.txt, a data file of solution #1 values for -1 <= x <= +1, 0 <= t <= 3/pi, using 11 grid points in x and in t.
• burgers_solution_test02.txt, a data file of solution #1 values for -1 <= x <= +1, 0 <= t <= 3/pi, using 41 grid points in x and in t.
• burgers_solution_test03.txt, a data file of solution #2 values for 0 <= x <= 2 Pi, 0 <= t <= 1, using 11 grid points in x and in t.
• burgers_solution_test04.txt, a data file of solution #2 values for 0 <= x <= 2 Pi, 0 <= t <= 1, using 41 grid points in x and in t.

List of Routines: {#list-of-routines align=”center”}

• BURGERS_VISCOUS_TIME_EXACT1 evaluates solution #1 to the Burgers equation.
• BURGERS_VISCOUS_TIME_EXACT1 evaluates solution #2 to the Burgers equation.
• HERMITE_EK_COMPUTE computes a Gauss-Hermite quadrature rule.
• IMTQLX diagonalizes a symmetric tridiagonal matrix.
• R8_ABS returns the absolute value of an R8.
• R8_EPSILON returns the R8 roundoff unit.
• R8_MAX returns the maximum of two R8’s.
• R8_MIN returns the minimum of two R8’s.
• R8_SIGN returns the sign of an R8.
• R8MAT_PRINT prints an R8MAT.
• R8MAT_PRINT_SOME prints some of an R8MAT.
• R8MAT_WRITE writes an R8MAT file.
• R8VEC_EVEN_NEW returns an R8VEC of values evenly spaced between ALO and AHI.
• R8VEC_PRINT prints an R8VEC.
• TIMESTAMP prints the current YMDHMS date as a time stamp.

You can go up one level to the C++ source codes.

Last revised on 26 September 2015.