and the "cut-cell" technique by
NAFEMS lecture, Kenilworth, October 1999
Summary of main themes
- Although fluid-flow, thermal and structural analysis are well
handled by modern software packages, certain
deficiencies remain, of which the chief are:
- The road from CAD to CFD is not yet easy to travel;
- The analyses of stresses in solids and of the flow of fluids are
handled by two distinct sets of algorithms, computer codes and
- In respect of fluid flow (at least) the models of the physical
processes are often either inexact or computationally
expensive, and frequently both.
- Some progress is here reported regarding the CAD-to-CFD difficulty,
with the STL format proving to be of key importance.
- Cartesian grids have many merits; but bodies having curved surfaces
do not fit them well.
However, the PARSOL "cut-cell" technique solves this difficulty.
- It will be shown that solid stress and fluid flow can be analysed by
a single algorithm, a single code, and therefore a single specialist.
- Good compromises between economy and realism for simple circumstances
- the LVEL model of turbulence and
- the IMMERSOL model of radiation.
- MFM, the "multi-fluid model" of turbulence, promises
the same for more complex circumstances, especially those involving
An overview of computer-aided engineering
CAD to CFD via VR and PARSOL, with a link to Hotbox
SFT: simultaneous Solid-stress, Fluid-flow and Thermal analysis
Modelling turbulence, radiation and chemical reaction
The revival of remote computing