Method of characteristics in quasi-steady compressible flows. / Vardy, A. E.
BHR Group - Surge Analysis - System Design, Simulation, Monitoring and Control, 10th International Conference on Pressure Surges. BHR Group, 2008. p. 505-518.Research output: Chapter in Book/Report/Conference proceeding › Other chapter contribution
}
TY - CHAP
T1 - Method of characteristics in quasi-steady compressible flows
A1 - Vardy,A. E.
AU - Vardy,A. E.
PB - BHR Group
PY - 2008
Y1 - 2008
N2 - Differences are highlighted between applications of the method of characteristics (MOC) to compressible and incompressible flows. Attention is focussed on regions of steady or nearly-steady flow that commonly occur locally within general unsteady flows. It is shown that, except at very small Mach numbers, fixed-grid MOC methods can give strongly distorted predictions of axial variations of pressure and velocity. Furthermore, integration time steps chosen for maximum accuracy in one location are likely to be less suitable in other locations. Whilst greatest attention is paid to flows with moderate subsonic Mach numbers, a second purpose of the paper is to show why classical applications of fixed-grid MOC to liquid transients in pipes are inherently incapable of modelling steady flows exactly. © BHR Group 2008.
AB - Differences are highlighted between applications of the method of characteristics (MOC) to compressible and incompressible flows. Attention is focussed on regions of steady or nearly-steady flow that commonly occur locally within general unsteady flows. It is shown that, except at very small Mach numbers, fixed-grid MOC methods can give strongly distorted predictions of axial variations of pressure and velocity. Furthermore, integration time steps chosen for maximum accuracy in one location are likely to be less suitable in other locations. Whilst greatest attention is paid to flows with moderate subsonic Mach numbers, a second purpose of the paper is to show why classical applications of fixed-grid MOC to liquid transients in pipes are inherently incapable of modelling steady flows exactly. © BHR Group 2008.
UR - http://www.scopus.com/inward/record.url?partnerID=yv4JPVwI&eid=2-s2.0-56149098914&md5=deeb5c0b5103d6d7c58862201329aae8
UR - http://www.bhrgroup.com/conferences/pressure_surges_10.aspx
M1 - Other chapter contribution
SN - 978-185598095-2
BT - BHR Group - Surge Analysis - System Design, Simulation, Monitoring and Control, 10th International Conference on Pressure Surges
T2 - BHR Group - Surge Analysis - System Design, Simulation, Monitoring and Control, 10th International Conference on Pressure Surges
SP - 505
EP - 518
ER -