Linear conservation laws for ODEs
โ Scribed by L.F. Shampine
- Publisher
- Elsevier Science
- Year
- 1998
- Tongue
- English
- Weight
- 697 KB
- Volume
- 35
- Category
- Article
- ISSN
- 0898-1221
No coin nor oath required. For personal study only.
โฆ Synopsis
Some physical systems described by ODEs have quantities that are conserved as the system evolves. Runge-Kutta formulas and linear multistep methods preserve linear conservation laws automatically. A code for the integration of ODEs involves a number of algorithms in addition to the basic formula. It is shown here that popular codes preserve linear conservation laws if they are used properly. An application is made to differential-algebraic equations of index 2 arising in the solution of the Navier-Stokes equation by the method of lines.
๐ SIMILAR VOLUMES
Some ODEs have conservation laws, functions of a solution with constant values. Generally, numerical solutions do not satisfy these laws. This can mean that the numerical solution does not have the right qualitative behavior. The theory and practice of imposing conservation laws by projection is de
We use Noether's theorem on variational principles invariant under a group of infinitesimal transformations to obtain a class of conservation laws for linear piezoelectric materials and linear elastic dielectrics.
Noether's theorem on variational principles invariant under a group of infinitesimal transformations is used to obtain two conservation laws associated with linear viscoelastodynamics. These laws represent viscoelastic generalizations of two conservation laws in elasticity.