Effects of isothermal stratification strength on vorticity dynamics for single-mode compressible Rayleigh-Taylor instability
Abstract
The effects of isothermal initial stratification on the dynamics of the vorticity for single-mode Rayleigh-Taylor instability (RTI) are examined using two-dimensional fully compressible wavelet-based direct numerical simulations. Here, the simulations model low Atwood number (A = 0.04) RTI development for four different initial stratification strengths, corresponding to Mach numbers from 0.3 (weakly stratified) to 1.2 (strongly stratified), and for three different Reynolds numbers, from 25 500 to 102 000. Here, the Mach number is based on the Atwood-independent gravity wave speed and characterizes the strength of the initial stratification. All simulations use adaptive wavelet-based mesh refinement to achieve very fine spatial resolutions at relatively low computational cost. For all stratifications, the RTI bubble and spike go through the exponential growth regime, followed by a slowing of the RTI evolution.
- Authors:
-
- Univ. of Colorado, Boulder, CO (United States)
- Univ. of Illinois, Chicago, IL (United States)
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Publication Date:
- Research Org.:
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
- Sponsoring Org.:
- USDOE National Nuclear Security Administration (NNSA)
- OSTI Identifier:
- 1573339
- Report Number(s):
- LA-UR-18-31598
Journal ID: ISSN 2469-990X; TRN: US2100161
- Grant/Contract Number:
- 89233218CNA000001
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review Fluids
- Additional Journal Information:
- Journal Volume: 4; Journal Issue: 9; Journal ID: ISSN 2469-990X
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 42 ENGINEERING
Citation Formats
Wieland, Scott A., Hamlington, Peter E., Reckinger, Scott J., and Livescu, Daniel. Effects of isothermal stratification strength on vorticity dynamics for single-mode compressible Rayleigh-Taylor instability. United States: N. p., 2019.
Web. doi:10.1103/PhysRevFluids.4.093905.
Wieland, Scott A., Hamlington, Peter E., Reckinger, Scott J., & Livescu, Daniel. Effects of isothermal stratification strength on vorticity dynamics for single-mode compressible Rayleigh-Taylor instability. United States. https://doi.org/10.1103/PhysRevFluids.4.093905
Wieland, Scott A., Hamlington, Peter E., Reckinger, Scott J., and Livescu, Daniel. Thu .
"Effects of isothermal stratification strength on vorticity dynamics for single-mode compressible Rayleigh-Taylor instability". United States. https://doi.org/10.1103/PhysRevFluids.4.093905. https://www.osti.gov/servlets/purl/1573339.
@article{osti_1573339,
title = {Effects of isothermal stratification strength on vorticity dynamics for single-mode compressible Rayleigh-Taylor instability},
author = {Wieland, Scott A. and Hamlington, Peter E. and Reckinger, Scott J. and Livescu, Daniel},
abstractNote = {The effects of isothermal initial stratification on the dynamics of the vorticity for single-mode Rayleigh-Taylor instability (RTI) are examined using two-dimensional fully compressible wavelet-based direct numerical simulations. Here, the simulations model low Atwood number (A = 0.04) RTI development for four different initial stratification strengths, corresponding to Mach numbers from 0.3 (weakly stratified) to 1.2 (strongly stratified), and for three different Reynolds numbers, from 25 500 to 102 000. Here, the Mach number is based on the Atwood-independent gravity wave speed and characterizes the strength of the initial stratification. All simulations use adaptive wavelet-based mesh refinement to achieve very fine spatial resolutions at relatively low computational cost. For all stratifications, the RTI bubble and spike go through the exponential growth regime, followed by a slowing of the RTI evolution.},
doi = {10.1103/PhysRevFluids.4.093905},
journal = {Physical Review Fluids},
number = 9,
volume = 4,
place = {United States},
year = {Thu Sep 26 00:00:00 EDT 2019},
month = {Thu Sep 26 00:00:00 EDT 2019}
}
Web of Science
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