Published August 2016
| Version Accepted Version
Conference Paper
Open
Acceleration-driven variable-density turbulent flow
Abstract
We discuss turbulent dynamics and mixing of a variable-density flow subject to a uniform-acceleration field. The flow and misalignments of pressure and density gradients are investigated for small to large density ratios, with evidence that the small-density ratio flow is described by the Boussinesq approximation. A new shear-layer growth rate is reported, along with an extension of uniform-density flow vorticity-alignment statistics in the variable-density ow studied. Spectra collapse when properly scaled for variable density.
Additional Information
The work is supported by DOE Grant DE-NA0002382, AFOSR Grant FA9550-12-1-0461, NSF GRFP under Grant DGE-1144469, Caltech, and Blue Waters PRAC, supported by NSF OCI-0725070 and ACI-1238993, and Illinois. Data-storage/-visualization computer cluster, integrated by Daniel Lang and developed with support by NSF MRI Grant EIA-0079871, is used. Computations are also performed on the Caltech Zwicky computer cluster, supported by NSF MRI-R2 PHY-0960291 and by the Sherman Fairchild Foundation. The work was also supported by the Cray Trinity system of ACES, a partnership between LANL and SNL for the U.S. DOE's NNSA. We would like to acknowledge discussions with Profs. Dan Meiron and Dale Pullin, and the collaboration with Prof. Christian Ott in the computations. Note: An error was noted in the alignment statistics of vorticity and baroclinic torques in the originally posted paper and conference presentation. The present typescript is an update without the corresponding sections. The authors regret the original error.Attached Files
Accepted Version - eScholarship_UC_item_61d722q6.pdf
Files
eScholarship_UC_item_61d722q6.pdf
Additional details
Identifiers
- Eprint ID
- 70375
- Resolver ID
- CaltechAUTHORS:20160915-111630955
Related works
- Describes
- http://escholarship.org/uc/item/61d722q6 (URL)
Funding
- Department of Energy (DOE)
- DE-NA0002382
- Air Force Office of Scientific Research (AFOSR)
- FA9550-12-1-0461
- NSF Graduate Research Fellowship
- DGE-1144469
- Caltech
- Blue Waters PRAC
- NSF
- OCI-0725070
- NSF
- ACI-1238993
- NSF
- EIA-0079871
- NSF
- PHY-0960291
- Sherman Fairchild Foundation
Dates
- Created
-
2016-09-15Created from EPrint's datestamp field
- Updated
-
2023-02-21Created from EPrint's last_modified field
Caltech Custom Metadata
- Caltech groups
- GALCIT