Engineering Mechanics Unit (EMU): Recent submissions

  • Some studies on vortices with density stratification 
    Dixit, Harish N. (Jawaharlal Nehru Centre for Advanced Scientific ResearchEngineering Mechanics Unit (EMU), 2010)
    The effects of density stratification on the fie stability and evolution of vortices is investigated. Baroclinic vorticity generated due to density inhomogeneities can have important implications for the behavior of ...
  • Saturation of vorticity growth in fully-developed fluid turbulence 
    Thantanapally, Chakradhar (Jawaharlal Nehru Centre for Advanced Scientific ResearchEngineering Mechanics Unit (EMU), 2013-08-05)
    Turbulence can be defined as that state of matter characterized by a loss of coherence in space and time, as a result of the non-linear interaction of a large number of degrees of freedom, in excess of billions even for ...
  • Higher order lattice boltzmann for thermo-hydrodynamics 
    Sorathiya, Shahajhan Hassanali (Jawaharlal Nehru Centre for Advanced Scientific ResearchEngineering Mechanics Unit (EMU), 2013-06-07)
    In the last two decades, lattice Boltzmann method has emerged as one of the alternatives to do complex isothermal and incompressible CFD simulations. It is based on kinetic theory which is a molecular description of the ...
  • Kinetic theory and burnett order constitutive relations for a smooth granular gas 
    Gupta, Vinay Kumar (Jawaharlal Nehru Centre for Advanced Scientific ResearchEngineering Mechanics Unit (EMU), 2011)
    A granular material is a conglomeration of discrete macroscopic (>1 mm in size) solid particles or grains. Granular materials are commonplace in nature and industry. According to Richard et al. (2005), “Granular materials ...
  • Random number generators a la Boltzmann 
    Agrawal, Samarth (Jawaharlal Nehru Centre for Advanced Scientific ResearchEngineering Mechanics Unit (EMU), 2018-06-23)
    In the last few decades, simulations of stochastic processes have gained prominence in many elds of science and engineering. These simulations rely on Random Number generators (RNGs), routines that produce seemingly ...
  • An experimental study of mantle convection 
    Prakash, Vivek N. (Jawaharlal Nehru Centre for Advanced Scientific ResearchEngineering Mechanics Unit (EMU), 2009)
    In this thesis, we report results from laboratory experiments conducted to study mantle convection. Mantle convection corresponds to a regime of high Rayleigh and Prandtl numbers. In this chapter, we first give a introduaction ...
  • Nonlinear hydrodynamics and rheology of granular and gas-solid suspensions 
    Saha, Saikat (Jawaharlal Nehru Centre for Advanced Scientific ResearchEngineering Mechanics Unit (EMU), 2017-07-31)
    Granular matter is a collection of large number of solid particles where the particle size ranges from 1mm to meters (Saturn’s ring) and it is found everywhere in nature (avalanche, debris flows, Planetary rings, etc.) ...
  • Rarefied granular gases: correlations, asymptotic expansion and hydrodynamics 
    Rongali, Ramakrishna (Jawaharlal Nehru Centre for Advanced Scientific ResearchEngineering Mechanics Unit (EMU), 2017-12-01)
    Granular materials are conglomerations of discrete macroscopic particles, which are ubiquitous in our daily lives, whose size can vary from 1 mm to meters to kilometres. They play an important role in applications as ...
  • Crystallographic lattice boltzmann method 
    Namburi, N.L.D.B. Manjusha (Jawaharlal Nehru Centre for Advanced Scientific ResearchEngineering Mechanics Unit (EMU), 2017-10-23)
    In the last two decades, Lattice Boltzmann Method (LBM) has emerged as an e cient alternative for hydrodynamic simulations. In LBM, a ctitious lattice with suitable isotropy in the velocity space is considered to recover ...
  • Experimental studies in buoyancy-driven exchange flows and turbulent jet 
    Bharadwaj, Sunil V. (Jawaharlal Nehru Centre for Advanced Scientific ResearchEngineering Mechanics Unit (EMU), 2018)
    Buoyancy drives many flows in nature as well as in industrial processes. It drives the climate - it plays an important role in the vertical transport of heat and water vapour. Buoyancy also acts as a restoring force in ...
  • The orientation dynamics of anisotropic particles in shearing flows 
    Marath, Navaneeth Kizhakke (Jawaharlal Nehru Centre for Advanced Scientific ResearchEngineering Mechanics Unit (EMU), 2016-10-06)
    The thesis investigates the first effects of micro-scale inertia and stochastic orientation fluctuations on the orientation dynamics of spheroids in shearing flows. The first chapter of the thesis focuses on a single ...
  • Plane shock waves in granular gases and regularized moment equations 
    Lakshminarayana Reddy, M.H. (Jawaharlal Nehru Centre for Advanced Scientific ResearchEngineering Mechanics Unit (EMU), 2016-06-20)
    Granular materials are usually defined to be a collection of large number of discrete, dissipative, solid particles, which are ubiquitous in nature. They are one of the most used materials in the real world after water, ...
  • A two-dimensional vortex sheet model for a temporal free shear layer: integrating beyond the Moore singularity by the technique of viscosity switch smoothing 
    Paul, Ujjayan (Jawaharlal Nehru Centre for Advanced Scientific ResearchEngineering Mechanics Unit (EMU), 2016-02-26)
    The Navier-Stokes equations are the fundamental equations governing the dynamics of Newtonian uids, if one neglects theirs derivation from the Boltzmann equation of molecular dynamics. The inviscid Navier-Stokes equations ...
  • Experimental study of vertically vibrated granular matter: patterns and segregation 
    Ansari, Mohammed Istafaul Haque (Jawaharlal Nehru Centre for Advanced Scientific ResearchEngineering Mechanics Unit (EMU), 2015-10-19)
    This thesis explores the dynamical behavior of granular materials via experiments in a vertically vibrated granular bed. Experiments are designed with the primary objective to understand the pattern formation dynamics ...
  • Compressible DNS studies of the boundary layer on a low pressure turbine blade at high incidence 
    Ranjan, Rajesh (Jawaharlal Nehru Centre for Advanced Scientific ResearchEngineering Mechanics Unit (EMU), 2015-11-27)
    The gas turbine is an integral part of the power generation system in most of the aviation industry. The overall efficiency of an engine depends chiefly on the efficiency of the gasturbine, which in turn depends on ...
  • The impact of aerosols and land surface properties on the lifted temperature minimum in the nocturnal atmospheric boundary layer field and laboratory experiments 
    Singh, Dhiraj Kumar (Jawaharlal Nehru Centre for Advanced Scientific ResearchEngineering Mechanics Unit (EMU), 2013-11-05)
    The thesis focuses on the effect of radiation forcing by atmospheric aerosols on the nocturnal boundary layer close to ground. This study is on the anomalous temperature profile that develops after sun-set, under calm, ...
  • Lattice fokker plank method for complex fluids 
    Singh, Shiwani (Jawaharlal Nehru Centre for Advanced Scientific ResearchEngineering Mechanics Unit (EMU), 2015-02-27)
    The constitutive relations used in numerical modeling of coupled polymeric solution are mostly obtained by a pre-averaging approximation of the underlying micro-mechanical model for polymer. However, in time-dependent ...
  • Novel wing designs for tractor-propeller aircraft theory, CFD and wind tunnel test results 
    Belur, Rakshith Raghavan (Jawaharlal Nehru Centre for Advanced Scientific ResearchEngineering Mechanics Unit (EMU), 2013-02-01)
    This thesis proposes novel wing designs with lower drag for propeller/rotor driven aircraft in tractor configuration with particular emphasis on a method of designing wings with lower induced drag by exploiting the ...
  • Global stability analysis of non-parallei flows 
    Swaminathan, Gayathri (Jawaharlal Nehru Centre for Advanced Scientific ResearchEngineering Mechanics Unit (EMU), 2010)
    Most shear flows are spatially developing, i.e., their velocity profile evolves as the flow proceeds downstream. Typically, as the Reynolds number increases, the laminar shear flow undergoes a linear instability, followed ...
  • Insights into turbulent free-shear-layer dynamics from vortex-gas computations and statistical mechanics 
    Suryanarayanan, Saikishan (Jawaharlal Nehru Centre for Advanced Scientific ResearchEngineering Mechanics Unit (EMU), 2014-07-30)
    The word „turbulence‟ is most commonly encountered during an in-flight announcement urging passengers to fasten seat-belts, in anticipation of unsteadiness due to the large scale turbulent motion in the atmosphere. ...

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