Positive Scheme Numerical Simulation of High Mach Number Astrophysical Jets

High Mach number astrophysical jets are simulated using a positive scheme, and are compared with WENO-LF simulations. A version of the positive scheme has allowed us to simulate astrophysical jets with radiative cooling up to Mach number 270 with respect to the heavy jet gas, a factor of two times h...

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Bibliographic Details
Published in:Journal of scientific computing 2008-03, Vol.34 (3), p.247-259
Main Authors: Ha, Youngsoo, Gardner, Carl L.
Format: Article
Language:English
Subjects:
Algorithms
Computational Mathematics and Numerical Analysis
High Mach number
Jets
Mathematical and Computational Engineering
Mathematical and Computational Physics
Mathematics
Mathematics and Statistics
Simulation
Theoretical
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Summary:High Mach number astrophysical jets are simulated using a positive scheme, and are compared with WENO-LF simulations. A version of the positive scheme has allowed us to simulate astrophysical jets with radiative cooling up to Mach number 270 with respect to the heavy jet gas, a factor of two times higher than the maximum Mach number attained with the WENO schemes and ten times higher than with CLAWPACK. Such high Mach numbers occur in many settings in astrophysical flows, so it is important to develop a scheme that can simulate at these Mach numbers.
ISSN:0885-7474
1573-7691
DOI:10.1007/s10915-007-9165-5