Engineering Mechanics Unit (EMU): Recent submissions

  • Vortex shedding patterns, their competition, and chaos in flow past inline oscillating rectangular cylinders 
    Srikanth, T. (Jawaharlal Nehru Centre for Advanced Scientific ResearchEngineering Mechanics Unit (EMU), 2011)
    In this thesis, vortex shedding from hxed and inhne oscillating rectangular cylinders is investigated for the first time to our knowledge. This is a numerical study, and the Lattice Boltzmann method has been used for ...
  • Experimental studies on taylor-couette flow of neutrally-buoyant suspensions 
    Ramesh, Prashanth (Jawaharlal Nehru Centre for Advanced Scientific ResearchEngineering Mechanics Unit (EMU), 2019)
    The well known Taylor-Couette flow, the flow between two rotating concentric cylinders is used for studies on hydrodynamic stability, flow transitions and pattern formation (Andereck et al., 1986; Benjamin, 1978a,b; ...
  • Vortex ring evolution and wall interaction in polymer solutions 
    Hegde, Swastik (Jawaharlal Nehru Centre for Advanced Scientific ResearchEngineering Mechanics Unit (EMU), 2019)
    Addition of small quantity of polymer to a turbulent flow is shown to reduce the drag drastically. This phenomena (also known as Tom’s effect) is studied very rigorously, because of industrial applications and also as a ...
  • A computational and semi-analytical study of laminar standing hydraulic jumps 
    Dasgupta, Ratul (Jawaharlal Nehru Centre for Advanced Scientific ResearchEngineering Mechanics Unit (EMU), 2010)
    A layer of fluid with a free-surface which is initially supercritical (local Froude Fr > 1), displays a near discontinuity in film-thickness at a location where the Froude number becomes unity. This is better known as ...
  • Nonlinear stability, bifurcation and mode interaction in granular plane couette flow 
    Shukla, Priyanka (Jawaharlal Nehru Centre for Advanced Scientific ResearchEngineering Mechanics Unit (EMU), 2010)
    This thesis starts with a brief overview of patterns in rapid granular flows driven by vibration, gravity and shear, e.g. standing wave patterns and convection rolls in a vibrated granular system, density waves in gravity ...
  • Field observations and laboratory simulation of the lifted temperature minimum 
    Mukund, V. (Jawaharlal Nehru Centre for Advanced Scientific ResearchEngineering Mechanics Unit (EMU), 2008)
    The present work is concerned with a peculiar vertical temperature distribution that sometimes develops over the ground during calm and clear nights. After sun- set, typically an inversion pro¯le is expected to form, in ...
  • A wavelet analysis of possible connections between solar processes, Indian monsoon rainfall and ENSO Indices. 
    Bhattacharya, Subarna (Jawaharlal Nehru Centre for Advanced Scientific ResearchEngineering Mechanics Unit (EMU), 2005)
    Abstract not available
  • Algebraic instability and transient growth in stratified shear flows 
    Bale, Rahul (Jawaharlal Nehru Centre for Advanced Scientific ResearchEngineering Mechanics Unit (EMU), 2009)
    In the present work we study the asymptotic and short time stabihty of stratified shear flow analytically and numerically. The algebraic growth and instability of stably stratified inviscid couette flow is studied ...
  • Particle dynamics simulation of gravity driven granular poiseuille flow 
    Chikkadi, Vijayakumar Kudleppa (Jawaharlal Nehru Centre for Advanced Scientific ResearchEngineering Mechanics Unit (EMU), 2008)
    The gravity-driven flow of granular materials in a vertical channel is simulated us- ing molecular dynamics technique. The granular particles are modelled as smooth hard disks, so the simulations are performed in two ...
  • Stability and transition in boundary layers: effect of transverse curvature and pressure gradient 
    Vinod, N. (Jawaharlal Nehru Centre for Advanced Scientific ResearchEngineering Mechanics Unit (EMU), 2005)
    Abstract not available
  • Density waves and fluctuations in three-dimensional granular poiseuille flow 
    Malik, Ashish (Jawaharlal Nehru Centre for Advanced Scientific ResearchEngineering Mechanics Unit (EMU), 2008)
    In the present thesis, the gravity driven granular Poiseuille flow has been probed via event-driven simulations in three dimensions between two infinite parallel plates. A monodisperse system of “rough” inelastic hard ...
  • Experimental and numerical study of parametric dependence of lift in flapping flight 
    Samanta, Devranjan (Jawaharlal Nehru Centre for Advanced Scientific ResearchEngineering Mechanics Unit (EMU), 2009)
    Flapping wings exhibit better performance than the fixed wings as the size of the flying objects decrease. In nature flight by the flapping wings is predominant in case of insects and small birds. Motivated by this aspect ...
  • Orientation dynamics of anisotropic particles in viscoelastic fluids 
    Dabade, Vivekanand (Jawaharlal Nehru Centre for Advanced Scientific ResearchEngineering Mechanics Unit (EMU), 2009)
    The present work concerns the orientation dynamics of anisotropic particles in viscoelastic °uids. A spheroidal geometry is taken as being representative of an anisotropic, axisymmetric particle, and the work is an ...
  • Direct numerical simulation of starting-plume cloud-flows 
    Aditya, Konduri (Jawaharlal Nehru Centre for Advanced Scientific ResearchEngineering Mechanics Unit (EMU), 2009)
    In the present work, we study the effect of off-source volumetric heating on a starting plume in an attempt to understand the fluid dynamics of clouds. Clouds play a major role in weather and climate. In the tropics cumulus ...
  • Velocity fluctuation, correlation and rheology in frictional granular shear flow 
    Gayen, Bishakhdatta (Jawaharlal Nehru Centre for Advanced Scientific ResearchEngineering Mechanics Unit (EMU), 2008)
    The study of granular materials has received a recent upsurge of interest in physics. This has been motivated by both the relevance of such flows to a wide range of industrial and geological processes, and by the realization ...
  • Numerical computation of spatially developing flows by full- multigrid technique 
    Sahu, Kirti Chandra (Jawaharlal Nehru Centre for Advanced Scientific ResearchEngineering Mechanics Unit (EMU), 2003)
    The instability of spatially developing laminar flows, such as that through converging/diverging channels, is often fundamentally different from flows that do not vary downstream. Another class of flows whose stability ...
  • Studies on buoyancy-induced open flows : plane thermal plume 
    Lakkaraju, Rajaram (Jawaharlal Nehru Centre for Advanced Scientific ResearchEngineering Mechanics Unit (EMU), 2007)
    In the present thesis, the natural convection flow over a line heat source is studied for the mean flow and the linear stability characteristics at different Prandtl numbers. This flow is purely driven by buoyancy and ...
  • On stratified jets and wakes generated by a self-propelled body 
    Asaithambi, Rajapandiyan (Jawaharlal Nehru Centre for Advanced Scientific ResearchEngineering Mechanics Unit (EMU), 2008)
    Wakes in a stratified medium have been studied with considerable interest owing to the ubiquity of such phenomena in nature and engineering applications. In this thesis we have investigated some of the characteristics ...
  • Laboratory simulation of lifted temperature minimum 
    Tiwari, Punit (Jawaharlal Nehru Centre for Advanced Scientific ResearchEngineering Mechanics Unit (EMU), 2006)
    Abstract not available
  • Unsteady aerodynamics of flapping flight 
    Dhar, Binaya Kumar (Jawaharlal Nehru Centre for Advanced Scientific ResearchEngineering Mechanics Unit (EMU), 2003)
    In the thesis we present a study on the unsteady aerodynamics of insect flight. Motivation for the study is to establish the rational for adopting unsteady aerodynamics principles in the design of Micro Air Vehicles (MAV) ...

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