The effect of the choice of the reference pressure location in numerical modelling of incompressible flow
Abstract
The discontinuity of a finite-element pressure field that is sometimes present in the neighborhood of the pressure-specification-point is shown to arise either from round-off, or from mistakes in modeling. The implications of this are considered. In particular it restricts grid refinement near the pressure-specification-point. The analysis can be extended to finite-difference calculations, and to other fields governed by equations similar to Poisson's equation.
- Publication:
-
International Journal for Numerical Methods in Fluids
- Pub Date:
- February 1984
- DOI:
- Bibcode:
- 1984IJNMF...4..147J
- Keywords:
-
- Computational Fluid Dynamics;
- Error Analysis;
- Finite Element Method;
- Fluid Pressure;
- Incompressible Flow;
- Pressure Distribution;
- Truncation Errors;
- Cavities;
- Couette Flow;
- Dirichlet Problem;
- Discontinuity;
- Laminar Flow;
- Navier-Stokes Equation;
- Poisson Equation;
- Fluid Mechanics and Heat Transfer