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Pressure-enthalpy coupling for subsonic flows with density variationEmans, M. ...The method we present is derived from the SIMPLE algorithm. Instead of solving the linear equations for each variable and the pressure-correction equation separately in a so called segregated manner ... it relies on the solutionof a linear system that comprises the discretisation of enthalpy and pressure-correction equation that are linked through physical coupling terms.These coupling terms are deduced from a more accurate approximation of the density update (compared to standard SIMPLE method) that is reasonable with respect to the thermodynamic formulation of the density increment. The method leads to a considerable acceleration of the non-linear SIMPLE convergence not only in cases characterised by a global density change due to the rise of the pressure, but also if the enthalpy is merely spatially distributed in the computational domain. In this contribution we will first discuss the key idea of the new method and compare it to established techniques. Then we will demonstrate its advantages in terms of computational efficiency and robustness for industrial CFD applications, e.g. combustion and engine flow calculations on unstructured grids.Source: Advances in fluid mechanics VIII (Str. 127-136)Type of material - conference contributionPublish date - 2010Language - englishCOBISS.SI-ID - 14773270
Author
Emans, M. |
Frolov, S. |
Lidskii, B. |
Posvyanskii, V. |
Žunič, Zoran |
Basara, B.
Topics
finite volumes |
pressure-enthalpy coupling |
variable-density flow |
CFD
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Database name | Field | Year |
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Links to authors' personal bibliographies | Links to information on researchers in the SICRIS system |
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Emans, M. | |
Frolov, S. | |
Lidskii, B. | |
Posvyanskii, V. | |
Žunič, Zoran | 12653 |
Basara, B. |
Source: Personal bibliographies
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