摘要:考虑了一个变系数空间分数阶对流-扩散方程.这个方程是将一般的对流一扩散方程中的空间二阶导数用β(1<β≤2)阶导数代替.提出了一个隐式差分格式,验证了这个差分格式是无条件稳定的,并证明了它的收敛性,其收敛阶为o(r+h),最后给出了数值例子.
A space fractional convection-diffusion equation is considered. The equation is obtained from the classical convection-diffusion equation by replacing the second-order space derivative with fractional derivative of orderβ(1〈β≤2). An implicit difference scheme is presented. It is shown that the method is unconditional stable and the convergence order of the method is o(r+h). Finally, some numerical examoles are given.