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Non-reflective inlet conditions for the calculation of unsteady turbulent compressible flows at low Mach number

(2014) MECHANICS & INDUSTRY. 15(3). p.179-189
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Abstract
For the unsteady simulation of compressible subsonic flows (Large Eddy Simulation or Direct Numerical Simulation), the proper handling of the inlet boundary is a challenging task. Indeed, inflow generation through imposition of the velocity may lead to a non-physical reflection of the upstream acoustic waves. In the present contribution, a method that allows both filtering of these waves and proper imposition of the required variables is proposed. This method is based on identification of the roles of the temporal rate of change of wave amplitudes at the inlet in the low Mach number regime. The formulation obtained is tested numerically on unsteady one-dimensional flows at low Mach number for which the unsteady inlet velocity signal is purely harmonic or harmonic with the superimposition of synthetic turbulence.
Keywords
SIMULATIONS, NONREFLECTING BOUNDARY-CONDITIONS, Non-reflective boundary conditions, inlet conditions, low Mach number, turbulence, acoustics

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Chicago
Moguen, Yann, Pascal Bruel, Vincent Perrier, and Erik Dick. 2014. “Non-reflective Inlet Conditions for the Calculation of Unsteady Turbulent Compressible Flows at Low Mach Number.” Mechanics & Industry 15 (3): 179–189.
APA
Moguen, Y., Bruel, P., Perrier, V., & Dick, E. (2014). Non-reflective inlet conditions for the calculation of unsteady turbulent compressible flows at low Mach number. MECHANICS & INDUSTRY, 15(3), 179–189.
Vancouver
1.
Moguen Y, Bruel P, Perrier V, Dick E. Non-reflective inlet conditions for the calculation of unsteady turbulent compressible flows at low Mach number. MECHANICS & INDUSTRY. 2014;15(3):179–89.
MLA
Moguen, Yann, Pascal Bruel, Vincent Perrier, et al. “Non-reflective Inlet Conditions for the Calculation of Unsteady Turbulent Compressible Flows at Low Mach Number.” MECHANICS & INDUSTRY 15.3 (2014): 179–189. Print.
@article{4417478,
  abstract     = {For the unsteady simulation of compressible subsonic flows (Large Eddy Simulation or Direct Numerical Simulation), the proper handling of the inlet boundary is a challenging task. Indeed, inflow generation through imposition of the velocity may lead to a non-physical reflection of the upstream acoustic waves. In the present contribution, a method that allows both filtering of these waves and proper imposition of the required variables is proposed. This method is based on identification of the roles of the temporal rate of change of wave amplitudes at the inlet in the low Mach number regime. The formulation obtained is tested numerically on unsteady one-dimensional flows at low Mach number for which the unsteady inlet velocity signal is purely harmonic or harmonic with the superimposition of synthetic turbulence.},
  author       = {Moguen, Yann and Bruel, Pascal and Perrier, Vincent and Dick, Erik},
  issn         = {2257-7777},
  journal      = {MECHANICS & INDUSTRY},
  keywords     = {SIMULATIONS,NONREFLECTING BOUNDARY-CONDITIONS,Non-reflective boundary conditions,inlet conditions,low Mach number,turbulence,acoustics},
  language     = {eng},
  number       = {3},
  pages        = {179--189},
  title        = {Non-reflective inlet conditions for the calculation of unsteady turbulent compressible flows at low Mach number},
  url          = {http://dx.doi.org/10.1051/meca/2014027},
  volume       = {15},
  year         = {2014},
}

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