On the accuracy of impluse methods for fluid flow
Journal Article
·
· SIAM Journal on Scientific Computing
- Courant Inst. of Mathematical Sciences, New York, NY (United States)
A Lagrangian numerical method based on impulse variables is analyzed. The relation between discrete impulse vectors and vortex dipoles with a prescribed dipole moment is presented and used to adapt the high-accuracy cutoff functions of vortex methods for use in impulse-based methods. The long-time implementation of the impulse method is shown to contain a source of error whose growth in time leads to a severe loss of accuracy in interior flows. Applications for which impulse methods are well suited are identified.
- Sponsoring Organization:
- USDOE Office of Energy Research, Washington, DC (United States); Department of the Air Force, Washington, DC (United States)
- DOE Contract Number:
- AC03-76SF00098
- OSTI ID:
- 653488
- Journal Information:
- SIAM Journal on Scientific Computing, Journal Name: SIAM Journal on Scientific Computing Journal Issue: 4 Vol. 19; ISSN 1064-8275; ISSN SJOCE3
- Country of Publication:
- United States
- Language:
- English
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