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Direct numerical simulation of single-species and binary-species boundary layers at high pressure

Conference · · AIAA Scitech 2021 Forum
DOI:https://doi.org/10.2514/6.2021-0682· OSTI ID:1959925
 [1];  [1]
  1. California Institute of Technology
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Direct numerical simulations of single-species and binary-species temporal boundary layers at high pressure are performed. The main objective is to investigate flow physics in a binary-species boundary layer at high pressure, with special attention to mass diffusion. The working fluids are nitrogen in the single-species cases, and a mixture of nitrogen and methane in the binary-species cases. An investigation of mean profiles shows that velocity and temperature profiles have steep gradients near the wall, whereas the mass fraction profiles do not have a steep gradient. This result indicates that the similarity law between velocity, temperature and mass fraction does not hold true in the binary-species boundary layer. The comparison of turbulent fluctuations shows that the qualitative characteristics of velocity and temperature are similar to each other. In contrast, profiles of mass fraction fluctuations are largely different from those of velocity and temperature. This result indicates that mass diffusion is not similar to momentum and thermal diffusions in binary-species boundary layers.

Research Organization:
California Institute of Technology (CalTech), Pasadena, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
DOE Contract Number:
SC0002679
OSTI ID:
1959925
Journal Information:
AIAA Scitech 2021 Forum, Conference: AIAA Scitech 2021 Forum, Held Virtually, 11-15, 19-21 Jan 2021
Country of Publication:
United States
Language:
English

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