Cardinal-Type Approximations for Conservation Laws of Mixed Type
Nonlinear partial dierential equations appear in many branches of physics, engineering and applied mathematics.
This paper provides a technical description of the application of collocation interpolation methods based on SincÂ functions to conservation laws of mixed hyperbolic-elliptic type, with Riemann type conditions. Sinc approximationsÂ to both derivatives and indenite integrals reduces the solution to an explicit system of algebraic equations. TheÂ nonlinear terms are easily handled with the help of Hadamard matrix multiplications. The error in the solutionÂ is shown to converge to the exact solution at an exponential rate. The convergence proof of the solution for theÂ discrete system is given using xed-point iteration. The scheme is numerically tested on the Van der Waals equationÂ in uid dynamics. Easy and economical implementation is the strength of this method.