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of 95
pro vyhledávání: '"Nichols, Joseph W."'
Autor:
Cook, David A., Nichols, Joseph W.
Understanding the receptivity of hypersonic flows to free-stream disturbances is crucial for predicting laminar to turbulent boundary layer transition. Input-output analysis as a receptivity tool considers which free-stream disturbances lead to the l
Externí odkaz:
http://arxiv.org/abs/2306.03248
Autor:
Dwivedi, Anubhav, Hildebrand, Nathaniel, Nichols, Joseph W., Candler, Graham V., Jovanović, Mihailo R.
Publikováno v:
Phys. Rev. Fluids 5, 063904 (2020)
We study physical mechanisms that trigger transient growth in a high-speed spatially-developing laminar boundary layer that interacts with an oblique shock wave. We utilize an approach based on power-iteration, with the global forward and adjoint lin
Externí odkaz:
http://arxiv.org/abs/1901.09132
Akademický článek
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Autor:
Dwivedi, Anubhav, Sidharth, G. S., Nichols, Joseph W., Candler, Graham V., Jovanović, Mihailo R.
Publikováno v:
J. Fluid Mech. (2019), vol. 880, pp. 113-135
We employ global input-output analysis to quantify amplification of exogenous disturbances in compressible boundary layer flows. Using the spatial structure of the dominant response to time-periodic inputs, we explain the origin of steady reattachmen
Externí odkaz:
http://arxiv.org/abs/1811.09046
Autor:
Jeun, Jinah, Nichols, Joseph W.
We examine amplifying behavior of small perturbations about Reynolds-averaged Navier-Stokes solutions (RANS) of a $M_j = 0.9$ subsonic turbulent jet using input-output (I/O) analysis. Singular value decomposition (SVD) of the resolvent of the lineari
Externí odkaz:
http://arxiv.org/abs/1806.09280
Autor:
Hildebrand, Nathaniel, Dwivedi, Anubhav, Nichols, Joseph W., Jovanović, Mihailo R., Candler, Graham V.
Publikováno v:
Phys. Rev. Fluids 3, 013906 (2018)
We investigate flow instability created by an oblique shock wave impinging on a Mach 5.92 laminar boundary layer at a transitional Reynolds number. The adverse pressure gradient of the oblique shock causes the boundary layer to separate from the wall
Externí odkaz:
http://arxiv.org/abs/1712.08239
Autor:
Nichols, Joseph W.
Publikováno v:
Connect to this title online; UW restricted.
Thesis (Ph. D.)--University of Washington, 2005.
Vita. Includes bibliographical references (p. 181-184).
Vita. Includes bibliographical references (p. 181-184).
Externí odkaz:
http://hdl.handle.net/1773/7128
Publikováno v:
Phys. Fluids, vol. 26, no. 2, p. 024103 (22 pages), February 2014
Dynamic mode decomposition (DMD) represents an effective means for capturing the essential features of numerically or experimentally generated flow fields. In order to achieve a desirable tradeoff between the quality of approximation and the number o
Externí odkaz:
http://arxiv.org/abs/1309.4165
Publikováno v:
In Journal of Controlled Release 10 December 2017 267:31-46
Autor:
Cook, David A.1 cookx894@umn.edu, Nichols, Joseph W.1
Publikováno v:
Theoretical & Computational Fluid Dynamics. Feb2022, Vol. 36 Issue 1, p155-180. 26p.