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http://dx.doi.org/10.5139/JKSAS.2007.35.7.586

Cancellation Problem of Preconditioned Euler Equations  

Lee, Sang-Hyeon (울산대학교 항공우주공학과)
Publication Information
Journal of the Korean Society for Aeronautical & Space Sciences / v.35, no.7, 2007 , pp. 586-591 More about this Journal
Abstract
The effects of cancellation errors on the convergence characteristics of preconditioned Euler equations at low Mach numbers are analyzed. Flows in a two-dimensional channel with a circular bump are calculated at different Mach numbers. It is shown that the cancellation error in the energy equation grows faster than those in the other equations as the Mach number decreases. It is also shown that the cancellation problem of the energy equation can be alleviated by multiplying the inversion of the preconditioner.
Keywords
Cancellation Error; Convergence Characteristics; Euler Equations; Preconditioner;
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