Finite Element Techniques for Fluid Flow

VISCOUS INCOMPRESSIBLE FLOW PROBLEMS 301

up to 200. The same authors

13

have more recently proposed the

use of linear pressure and quadratic velocity

fields

in order to obtain

more accurate results for pressures.

Kawahara et a/.

14

have solved steady state flow problems using

the same approximations as Hood.

13

They apply an improved

Newton-Raphson iteration method with which flows for Reynolds

numbers of up to 1200 are investigated.

Oden

15

solved unsteady flow problems using a six node inter-

polation function for both velocities and pressures. His solution

scheme will be reviewed in the following example.

9.5 FREE SURFACE FLOW

The 'natural' wa ...