Hi Dr. Wheeler, For a classic diffusion model, I would need to calculate the fourth order derivative of the distance variable. Is it right?
In fipy terms, phi[:] would be treated as below: vel[:] = ((-phi).faceGrad.divergence).faceGrad.divergence Do I really need an accuracy to the 4th order for distance variable phi[:]? If so, what can be done to improve the order of accuracy in fipy? Thanks. Best, Yunbo _______________________________________________ fipy mailing list [email protected] http://www.ctcms.nist.gov/fipy [ NIST internal ONLY: https://email.nist.gov/mailman/listinfo/fipy ]
