Zobrazeno 1 - 10
of 67
pro vyhledávání: '"Kurien, Susan"'
Autor:
Pal, Nairita, Boureima, Ismael, Braun, Noah, Kurien, Susan, Ramaprabhu, Praveen, Lawrie, Andrew
Publikováno v:
Phys. Rev. E 104, 025105 (2021)
We present a study of a two-point spectral turbulence model (Local Wave-Number model or LWN model) for the Rayleigh-Taylor (RT) instability. The model outcomes are compared with statistical quantities extracted from three-dimensional simulation of th
Externí odkaz:
http://arxiv.org/abs/2003.08071
We present a study of buoyancy-driven variable-density homogeneous turbulence, using a two-point spectral closure model. We compute the time-evolution of the spectral distribution in wavenumber $k$ of the correlation of density and specific-volume $b
Externí odkaz:
http://arxiv.org/abs/1807.04405
We compare results from a spectral model for non-stationary, inhomogeneous turbulence (Besnard et al., Theor. Comp. Fluid. Dyn., vol. 8, pp 1-35, 1996) with Direct Numerical Simulation (DNS) data of a shear-free mixing layer (SFML) (Tordella et al.,
Externí odkaz:
http://arxiv.org/abs/1511.05988
Autor:
Aluie, Hussein, Kurien, Susan
We employ a coarse-graining approach to analyze nonlinear cascades in Boussinesq flows using high-resolution simulation data. We derive budgets which resolve the evolution of energy and potential enstrophy simultaneously in space and in scale. We the
Externí odkaz:
http://arxiv.org/abs/1107.5006
Autor:
Kurien, Susan
Phenomenological and numerical studies of the small scale spectra of energy are presented for high Reynolds number rotating Boussinesq flows in unit aspect-ratio domains. We introduce a non-dimensional parameter Gamma such that when the potential vor
Externí odkaz:
http://arxiv.org/abs/1005.5366
Autor:
Frisch, Uriel, Kurien, Susan, Pandit, Rahul, Pauls, Walter, Ray, Samriddhi Sankar, Wirth, Achim, Zhu, Jian-Zhou
It is shown that the use of a high power $\alpha$ of the Laplacian in the dissipative term of hydrodynamical equations leads asymptotically to truncated inviscid \textit{conservative} dynamics with a finite range of spatial Fourier modes. Those at la
Externí odkaz:
http://arxiv.org/abs/0803.4269
We present data from high-resolution numerical simulations of the Navier-Stokes-$\alpha$ and the Leray-$\alpha$ models for two-dimensional turbulence. It was shown previously (Lunasin et al., J. Turbulence, 8, (2007), 751-778), that for wavenumbers $
Externí odkaz:
http://arxiv.org/abs/0711.2829
Rapidly rotating, stably stratified three-dimensional inviscid flows conserve both energy and potential enstrophy. We show that in such flows, the forward cascade of potential enstrophy imposes anisotropic constraints on the wavenumber distribution o
Externí odkaz:
http://arxiv.org/abs/0706.2800
A framework is developed to describe the two-point statistics of potential vorticity in rotating and stratified turbulence as described by the Boussinesq equations. The Karman-Howarth equation for the dynamics of the two-point correlation function of
Externí odkaz:
http://arxiv.org/abs/nlin/0507034