Volume 4, Issue 1
A Consistent Characteristic Boundary Condition for General Fluid Mixture and Its Implementation in a Preconditioning Scheme

Hua-Guang Li, Nan Zong, Xi-Yun Lu & Vigor Yang

Adv. Appl. Math. Mech., 4 (2012), pp. 72-92.

Published online: 2012-04

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  • Abstract

Characteristic boundary conditions that are capable of handling general fluid mixtures flow at all flow speeds are developed. The formulation is based on fundamental thermodynamics theories incorporated into an efficient preconditioning scheme in a unified manner. Local one-dimensional inviscid (LODI) relations compatible to the preconditioning system are proposed to obtain information carried by incoming characteristic waves at boundaries accurately. The approach has been validated against a variety of sample problems at a broad range of fluid states and flow speeds. Both acoustic waves and hydrodynamic flow features can pass through the boundaries of computational domain transparently without any unphysical reflection or spurious distortion. The approach can be reliably applied to fluid flows at extensive thermodynamic states and flow speeds in numerical simulations. Moreover, the use of the boundary condition shows to improve the computational efficiency.

  • Keywords

Real-fluid preconditioning method method of

  • AMS Subject Headings

65M10 78A48

  • Copyright

COPYRIGHT: © Global Science Press

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@Article{AAMM-4-72, author = {Hua-Guang Li, Nan Zong, Xi-Yun Lu and Vigor Yang}, title = {A Consistent Characteristic Boundary Condition for General Fluid Mixture and Its Implementation in a Preconditioning Scheme}, journal = {Advances in Applied Mathematics and Mechanics}, year = {2012}, volume = {4}, number = {1}, pages = {72--92}, abstract = {

Characteristic boundary conditions that are capable of handling general fluid mixtures flow at all flow speeds are developed. The formulation is based on fundamental thermodynamics theories incorporated into an efficient preconditioning scheme in a unified manner. Local one-dimensional inviscid (LODI) relations compatible to the preconditioning system are proposed to obtain information carried by incoming characteristic waves at boundaries accurately. The approach has been validated against a variety of sample problems at a broad range of fluid states and flow speeds. Both acoustic waves and hydrodynamic flow features can pass through the boundaries of computational domain transparently without any unphysical reflection or spurious distortion. The approach can be reliably applied to fluid flows at extensive thermodynamic states and flow speeds in numerical simulations. Moreover, the use of the boundary condition shows to improve the computational efficiency.

}, issn = {2075-1354}, doi = {https://doi.org/10.4208/aamm.11-m1160}, url = {http://global-sci.org/intro/article_detail/aamm/107.html} }
TY - JOUR T1 - A Consistent Characteristic Boundary Condition for General Fluid Mixture and Its Implementation in a Preconditioning Scheme AU - Hua-Guang Li, Nan Zong, Xi-Yun Lu & Vigor Yang JO - Advances in Applied Mathematics and Mechanics VL - 1 SP - 72 EP - 92 PY - 2012 DA - 2012/04 SN - 4 DO - http://doi.org/10.4208/aamm.11-m1160 UR - https://global-sci.org/intro/article_detail/aamm/107.html KW - Real-fluid KW - preconditioning method KW - method of AB -

Characteristic boundary conditions that are capable of handling general fluid mixtures flow at all flow speeds are developed. The formulation is based on fundamental thermodynamics theories incorporated into an efficient preconditioning scheme in a unified manner. Local one-dimensional inviscid (LODI) relations compatible to the preconditioning system are proposed to obtain information carried by incoming characteristic waves at boundaries accurately. The approach has been validated against a variety of sample problems at a broad range of fluid states and flow speeds. Both acoustic waves and hydrodynamic flow features can pass through the boundaries of computational domain transparently without any unphysical reflection or spurious distortion. The approach can be reliably applied to fluid flows at extensive thermodynamic states and flow speeds in numerical simulations. Moreover, the use of the boundary condition shows to improve the computational efficiency.

Hua-Guang Li, Nan Zong, Xi-Yun Lu & Vigor Yang. (1970). A Consistent Characteristic Boundary Condition for General Fluid Mixture and Its Implementation in a Preconditioning Scheme. Advances in Applied Mathematics and Mechanics. 4 (1). 72-92. doi:10.4208/aamm.11-m1160
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