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Strategies to reduce friction losses and their implications for the energy efficient design of internal flow domains

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Book Series: Schriftenreihe des Instituts für Strömungsmechanik, Karlsruher Institut für Technologie ISSN: 21998868 ISBN: 9783731502913 Year: Volume: 1 Pages: VII, 167 p. DOI: 10.5445/KSP/1000043770 Language: ENGLISH
Publisher: KIT Scientific Publishing
Subject: Technology (General)
Added to DOAB on : 2019-07-30 20:02:01
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This work aims at developing a strategy how the energy which has to be applied to transport incompressible and Newtonian fluids through straight ducts can be reduced. Based on the physical properties of laminar and turbulent flow, models are derived which theoretically lead to the reduction of the dissipated energy. The possibility to implement the proposed state due to appropriate design aspects in the cross section shape of the duct is investigated based on numerical simulations of the flow

Reactive Control of Turbulent Wall-Bounded Flows for Skin Friction Drag Reduction

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Book Series: Schriftenreihe des Instituts für Strömungsmechanik, Karlsruher Institut für Technologie ISSN: 21998868 ISBN: 9783731507666 Year: Volume: 4 Pages: IX, 193 p. DOI: 10.5445/KSP/1000080529 Language: ENGLISH
Publisher: KIT Scientific Publishing
Subject: Technology (General)
Added to DOAB on : 2019-07-28 18:37:01
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The work presents an attempt to improve the understanding of reactive drag reducing control of near-wall turbulence with respect to limitations present in a realistic application scenario. The reference reactive control scheme of opposition control is studied using direct numerical simulation through the consideration of various application oriented restrictions, i.e. local control application, limited spatial and temporal resolution of the scheme, sensor noise and control elements arrangement.

The formation of patterns in subaqueous sediment

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Book Series: Dissertationsreihe am Institut für Hydromechanik, Karlsruher Institut für Technologie / Karlsruher Institut für Technologie (KIT), Institut für Hydromechanik ISSN: 14394111 ISBN: 9783731505327 Year: Volume: 2016,1 Pages: XXIII, 142 p. DOI: 10.5445/KSP/1000054986 Language: ENGLISH
Publisher: KIT Scientific Publishing
Subject: General and Civil Engineering
Added to DOAB on : 2019-07-30 20:01:58
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This book investigates the formation of subaqueous patterns by means of high-fidelity numerical simulations which resolve all the relevant scales of the flow and the sediment bed. This is required to provide a space- and time-resolved information on the flow field and the sediment bed. Secondly, detailed analysis of the generated data allows to address the different governing mechanisms involved in the formation of patterns as well as to access the validity of various existing models.

Multiscale Turbulent Transport

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ISBN: 9783039282128 9783039282135 Year: Pages: 210 DOI: 10.3390/books978-3-03928-213-5 Language: English
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Technology (General) --- General and Civil Engineering
Added to DOAB on : 2020-04-07 23:07:08
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Turbulent transport is currently a prominent and ongoing investigation subject at the interface of methodologies from theory to numerical simulations and experiments, and it covers several spatiotemporal scales. Mathematical analysis, physical modelling, and engineering applications represent different facets of a classical, long-standing problem that is still far from being thoroughly comprehended. The goal of this Special Issue is to outline recent advances of such subjects as multiscale analysis in turbulent transport processes, Lagrangian and Eulerian descriptions of turbulence, advection of particles and fields in turbulent flows, ideal or nonideal turbulence (unstationary/inhomogeneous/anisotropic/compressible), turbulent flows in biofluid mechanics and magnetohydrodynamics, and the control and optimization of turbulent transport. The SI is open to regular articles, review papers focused on the state of the art and the progress made over the last few years, and new research trends.

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