Accession Number:
ADA101268
Title:
A Rational Function Approximation for the Integration Point in Exponentially Weighted Finite Element Methods
Descriptive Note:
Technical rept.
Corporate Author:
AIR FORCE OCCUPATIONAL MEASUREMENT CENTER RANDOLPH AFB TX
Personal Author(s):
Report Date:
1981-06-01
Pagination or Media Count:
25.0
Abstract:
A rational function is presented for approximating the function fz coth z - 1z that appears in several exponentially fitted or weighted finite difference and finite element methods for convection-diffusion problems. The approximation is less expensive to evaluate than fz and provides greater accuracy than the doubly asymptotic approximation when z 01.
Descriptors:
Subject Categories:
- Statistics and Probability