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Yulia Peet

Bio: Yulia Peet is an academic researcher from Arizona State University. The author has contributed to research in topics: Large eddy simulation & Turbulence. The author has an hindex of 12, co-authored 50 publications receiving 484 citations. Previous affiliations of Yulia Peet include Stanford University & Northwestern University.


Papers
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Journal ArticleDOI
TL;DR: In this article, the authors extended the theoretical analysis of Fukagata et al. to a fully three-dimensional situation allowing complex wall shapes, by considering arbitrarily-shaped surfaces and then formulate a restriction on a surface shape for which the current analysis is valid.
Abstract: This article can be considered as an extension of the paper of Fukagata et al (Phys Fluids 14:L73, 2002) who derived an analytical expression for the componential contributions into skin friction in a turbulent channel, pipe and plane boundary layer flows In this paper, we extend theoretical analysis of Fukagata et al limited to canonical cases with two-dimensional mean flow to a fully three-dimensional situation allowing complex wall shapes We start our analysis by considering arbitrarily-shaped surfaces and then formulate a restriction on a surface shape for which the current analysis is valid Theoretical formula for skin friction coefficient is thus given for streamwise and spanwise homogeneous surfaces of any shape, as well as some more complex configurations, including spanwise-periodic wavy patterns Current theoretical analysis is validated using the results of Large Eddy Simulations of a turbulent flow over straight and wavy riblets with triangular and knife-blade cross-sections Decomposition of skin friction into different componential contributions allows to analyze the influence of different dynamical effects on a drag modification by riblet-covered surfaces

66 citations

Proceedings ArticleDOI
23 Jun 2008
TL;DR: In this article, a large eddy simulation of a turbulent flow over a riblet-covered surface is performed for three cases: straight riblets and sinusoidal riblests with two different values of wavelength.
Abstract: It is known that longitudinal ribs manufactured in a flat surface act to reduce turbulent skin-friction drag, providing a moderate drag reduction of 4 to 8%. It is shown in this paper that this value can be increased by at least 50% if sinusoidal-like rods are used instead of conventional straight riblets. Large Eddy Simulation of a turbulent flow over a riblet-covered surface is performed for three cases: straight riblets and sinusoidal riblets with two different values of wavelength. All riblets have triangular cross-section. It is found that drag reduction with sinusoidal riblets depend strongly on the wavelength, showing a benefit over straight riblets for a larger value of the wavelength, and an opposite trend for a smaller value. Different nature of the flow over straight and sinusoidal riblet surfaces is revealed by looking at crossflow motion in transverse planes, mean and instantaneous streamwise vorticity, and organized coherent structures. Turbulent statistics is compared between all three cases, crossflow turbulence intensity is reduced for sinusoidal riblets as opposed to straight riblets.

53 citations

Journal ArticleDOI
TL;DR: In this article, the use of organized micro-structures on pipeline walls is proposed to obtain lower values of pressure losses with respect to smooth walls, and an optimum configuration maximizing the total drag reduction is proposed.

41 citations

Journal ArticleDOI
TL;DR: In this paper, large-scale structures that occur in turbulent Rayleigh-Benard convection in a wide-aspect-ratio cylindrical domain are studied by means of direct numerical simulation.

33 citations

Journal ArticleDOI
TL;DR: An overlapping mesh methodology that is spectrally accurate in space and up to third-order accurate in time is developed for solution of unsteady incompressible flow equations in three-dimensional domains.

30 citations


Cited by
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01 Jan 2016

983 citations

01 Apr 1992
TL;DR: In this paper, the authors proposed a monotone integrated large eddy simulation approach, which incorporates a form of turbulence modeling applicable when the large-scale flows of interest are intrinsically time dependent, thus throwing common statistical models into question.
Abstract: Fluid dynamic turbulence is one of the most challenging computational physics problems because of the extremely wide range of time and space scales involved, the strong nonlinearity of the governing equations, and the many practical and important applications. While most linear fluid instabilities are well understood, the nonlinear interactions among them makes even the relatively simple limit of homogeneous isotropic turbulence difficult to treat physically, mathematically, and computationally. Turbulence is modeled computationally by a two-stage bootstrap process. The first stage, direct numerical simulation, attempts to resolve the relevant physical time and space scales but its application is limited to diffusive flows with a relatively small Reynolds number (Re). Using direct numerical simulation to provide a database, in turn, allows calibration of phenomenological turbulence models for engineering applications. Large eddy simulation incorporates a form of turbulence modeling applicable when the large-scale flows of interest are intrinsically time dependent, thus throwing common statistical models into question. A promising approach to large eddy simulation involves the use of high-resolution monotone computational fluid dynamics algorithms such as flux-corrected transport or the piecewise parabolic method which have intrinsic subgrid turbulence models coupled naturally to the resolved scales in the computed flow. The physical considerations underlying and evidence supporting this monotone integrated large eddy simulation approach are discussed.

849 citations

Book
01 Jan 1966
TL;DR: Boundary value problems in physics and engineering were studied in this article, where Chorlton et al. considered boundary value problems with respect to physics, engineering, and computer vision.
Abstract: Boundary Value Problems in Physics and Engineering By Frank Chorlton. Pp. 250. (Van Nostrand: London, July 1969.) 70s

733 citations

Journal ArticleDOI
TL;DR: Roughly one in six of Walsh's 281 publications are included, photographically reproduced, and reproduction is excellent except for one paper from 1918, which is an obituary.
Abstract: a 'sleeper', receiving only modest attention for 50 years before emerging as a cornerstone of communications engineering in more recent times. Roughly one in six of Walsh's 281 publications are included, photographically reproduced. Reproduction is excellent except for one paper from 1918. The book also reproduces three brief papers about Walsh and his work, by W. E. Sewell, D. V. Widder and Morris Marden. The first two were written for a special issue of the SIAM Journal celebrating Walsh's 70th birthday; the third is an obituary.

676 citations