Engineering Mechanics Unit (EMU): Recent submissions

  • 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) ...
  • Experiments and numerical simulations of flapping wing flight 
    Shreyas, J.V. (Jawaharlal Nehru Centre for Advanced Scientific ResearchEngineering Mechanics Unit (EMU), 2005)
    Aerodynamic theory for fixed wing aeroplanes, in the high Reynolds number limit, has now been well established. In nature however, it is the flapping motion that dominates, and it is observed that the frequency of flapping ...
  • Effects of ambient viscosity on the entrainment and dynamics of a buoyant jet 
    Manikandan, M.S. (Jawaharlal Nehru Centre for Advanced Scientific ResearchEngineering Mechanics Unit (EMU), 2005)
    A free-shear flow driven by both initial momentum and buoyancy is a buoyant jet. Turbulent buoyant jets spread in a direction normal to their primary-flow direction by incorporating irrotational ambient fluid into the ...
  • Simulation of nano-scale flows by molecular dynamics methods 
    Ghosh, Antina (Jawaharlal Nehru Centre for Advanced Scientific ResearchEngineering Mechanics Unit (EMU), 2005)
    The density variation and the driven flow of a model Uquid interacting via 12- 6 Lennard Jones potential in a nano-sized channel has been studied through molecular dynamics simulations. The channel is unbounded in x and ...
  • Direct numerical simulation of transition in unstably stratified poiseuille flow 
    Srinivasan, Kaushik (Jawaharlal Nehru Centre for Advanced Scientific ResearchEngineering Mechanics Unit (EMU), 2007)
    In the present study, we have implemented a three-dimensional direct numerical simulation (DNS) algorithm for the purpose of studying instability and transition in a Poiseuille flow with imposed unstable stratification. ...
  • A linear stability analysis of the spatially-developing incompressible plane laminar mixing layer using minimal composite theory 
    Bhattacharya, Pinaki (Jawaharlal Nehru Centre for Advanced Scientific ResearchEngineering Mechanics Unit (EMU), 2007)
    Abstract not available
  • Statics and dynamics of drops an solid surfaces : theory and simulations 
    Thampi, Sumesh P. (Jawaharlal Nehru Centre for Advanced Scientific ResearchEngineering Mechanics Unit (EMU), 2012)
    Liquid drops supported on solid surfaces are commonly encountered in nature and in industries. While their aesthetically pleasing shapes and motion generate curiosity, the understanding of these shapes and their dynamics ...
  • Band model computation of near-surface longwave fluxes 
    Varghese, Saji (Jawaharlal Nehru Centre for Advanced Scientific ResearchEngineering Mechanics Unit (EMU), 2003)
  • Pattern formation and anomalous modes in axisymmetic, compressible Taylor-Couette Flow 
    Aghor, Pratik (Jawaharlal Nehru Centre for Advanced Scientific ResearchEngineering Mechanics Unit (EMU), 2018-04-23)
    Taylor-Couette flow is the annular flow between two concentric, differentially rotating cylinders. Figure 1.1 shows the geometry of the setup and is taken from Taylor [39]. Due to its geometric simplicity, this flow has ...
  • DSMC simulations of rarefied granular gases: hydrodynamics, rheology and segregation 
    Gupta, Ronak (Jawaharlal Nehru Centre for Advanced Scientific ResearchEngineering Mechanics Unit (EMU), 2017-11-16)
    Rarefied gas dynamics show marked deviations from Navier-Stokes dynamics, which make them interesting to study. This thesis on rarefied ’granular’ gas dynamics, aims to study a prototypical flow setup of smooth inelastic ...
  • Experiments on flapping flight under hovering condition 
    Pande, Nakul (Jawaharlal Nehru Centre for Advanced Scientific ResearchEngineering Mechanics Unit (EMU), 2016-07-05)
    In the recent past, we have begun to recognize many of the benefits that Micro Air Vehicles (MAV’s) may have. The important ones being, their small size and high manoeuvrability, which makes them suitable for reconnaissance, ...

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