A diagonal implicit scheme for computing flows with finite-rate chemistryA new algorithm for solving steady, finite-rate chemistry, flow problems is presented. The new scheme eliminates the expense of inverting large block matrices that arise when species conservation equations are introduced. The source Jacobian matrix is replaced by a diagonal matrix which is tailored to account for the fastest reactions in the chemical system. A point-implicit procedure is discussed and then the algorithm is included into the LU-SGS scheme. Solutions are presented for hypervelocity reentry and Hydrogen-Oxygen combustion. For the LU-SGS scheme a CFL number in excess of 10,000 has been achieved.
Document ID
19900051660
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Eberhardt, Scott (Washington, University Seattle, United States)
Imlay, Scott (Amtec Engineering, Inc. Bellevue, WA, United States)