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  • English  (2)
  • 1
    Online Resource
    Online Resource
    Providence :American Mathematical Society,
    Keywords: Fluid mechanics--Methodology. ; Electronic books.
    Description / Table of Contents: After centuries of research, turbulence in fluids is still an unsolved problem. The graduate-level lectures in this volume cover the state of the art of numerical methods for fluid mechanics. The research in this collection covers wavelet-based methods, the semi-Lagrangian method, the Lagrangian multi-pole method, continuous adaptation of curvilinear grids, finite volume methods, shock-capturing methods, and ENO schemes. The most recent research on large eddy simulations and Reynolds stress modeling is presented in a way that is accessible to engineers, postdoctoral researchers, and graduate students. Applications cover industrial flows, aerodynamics, two-phase flows, astrophysical flows, and meteorology. This volume would be suitable as a textbook for graduate students with a background in fluid mechanics.
    Type of Medium: Online Resource
    Pages: 1 online resource (165 pages)
    Edition: 1st ed.
    ISBN: 9781470439309
    Series Statement: CRM Proceedings & Lecture Notes ; v.16
    DDC: 532
    Language: English
    Note: Cover -- Title page -- Contents -- List of participants -- List of speakers -- Preface -- Wavelet based methods for PDEs -- Forecasting with a variable-resolution global model -- The simulation and analysis of vortex dynamics in nearly-inviscid 2D and layerwise-2D flows -- Direct and large eddy simulation of turbulence -- Continuous adaptation of a curvilinear grid -- The semi-Lagrangian method -- An introduction to single-point closure methodology -- Numerical simulation of two-phase flows -- A high-resolution adaptive moving mesh hydrodynamic algorithm -- Back Cover.
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  • 2
    Publication Date: 2023-06-05
    Description: The eastern equatorial Atlantic hosts a productive marine ecosystem that depends on the upward supply of nutrients. The main process that transports nutrients into the surface mixed layer is turbulent mixing induced in the shear zone between the surface mixed layer and the core of the Equatorial Undercurrent (EUC). Here we present experimental data from two trans-Atlantic cruises along the equator as well as moored observations allowing to characterize the seasonal cycle of velocity shear and turbulence. These data in combination with hydrographic data allow the analysis of the seasonal cycle of equatorial mixing and upward nitrate flux. The core of the EUC migrates vertically following an annual cycle. It reaches its shallowest position in boreal spring and its deepest position in boreal fall. The seasonal cycle of the maximum nitrate gradient instead shows a primary upward movement during boreal summer and a secondary upward movement in boreal winter bringing the nitrate gradient into the region of enhanced shear and turbulent mixing. During boreal spring, the nitrate gradient is located below the EUC core that is characterized by a minimum of turbulence. It prevents an upward supply of nitrate into the surface mixed layer and results in low productivity. The dynamic behavior of the shear zone is driven by a resonant equatorial basin mode associated with the east- and westward propagation of equatorial Kelvin and Rossby waves making the seasonal cycle of upward nutrient supply and productivity in the equatorial Atlantic distinct from that in the Pacific Ocean.
    Language: English
    Type: info:eu-repo/semantics/conferenceObject
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