• Field and laboratory experiments on aerosol-induced cooling in the nocturnal boundary layer 

  Mukund, V.; Singh, D. K.; Ponnulakshmi, V. K.; Subramanian, Ganesh; Sreenivas, K. R. (Wiley-Blackwell, 2014)

  Heat transfer processes in the nocturnal boundary layer (NBL) influence the surface energy budget and play an important role in many micrometeorological processes, including the formation of inversion layers, radiation-fog ...
• DIRECT SIMULATION MONTE CARLO FOR DENSE HARD SPHERES 

  Chao, Liu; Kwak, Sang Kyu; Ansumali, Santosh (World Scientific Publ Co Pte Ltd, 2014)

  We propose a modified direct simulation Monte Carlo (DSMC) method, which extends the validity of DSMC from rarefied to dense system of hard spheres (HSs). To assess this adapted method, transport properties of hard-sphere ...
• Diffused bounce-back condition and refill algorithm for the lattice Boltzmann method 

  Krithivasan, Siddharth; Wahal, Siddhant; Ansumali, Santosh (American Physical Society, 2014)

  A solid-fluid boundary condition for the lattice Boltzmann (LB) method, which retains the simplicity of the bounce-back method and leads to positive definite populations similar to the diffusive boundary condition, is ...
• Delayed Difference Scheme for Large Scale Scientific Simulations 

  Mudigere, Dheevatsa; Sherlekar, Sunil D.; Ansumali, Santosh (American Physical Society, 2014)

  We argue that the current heterogeneous computing environment mimics a complex nonlinear system which needs to borrow the concept of time-scale separation and the delayed difference approach from statistical mechanics and ...
• Free turbulent shear layer in a point vortex gas as a problem in nonequilibrium statistical mechanics 

  Suryanarayanan, Saikishan; Narasimha, Roddam; Dass, N. D. Hari (American Physical Society, 2014)

  This paper attempts to unravel any relations that may exist between turbulent shear flows and statistical mechanics through a detailed numerical investigation in the simplest case where both can be well defined. The flow ...
• Cumulus-Type Flows in the Laboratory and on the Computer: Simulating Cloud Form, Evolution, and Large-Scale Structure 

  Diwan, Sourabh S.; Prasanth, P.; Sreenivas, K. R.; Deshpande, S. M.; Narasimha, Roddam (American Meteorological Society, 2014)

  Cumulus clouds, which are among the largest sources of uncertainty in climate change science and tropical circulation, have to-date resisted the numerous attempts made during the last six decades to unravel their cloud-scale ...
• THE CONTRIBUTION OF THE BHATNAGAR-GROSS-KROOK MODEL TO THE DEVELOPMENT OF RAREFIED GAS DYNAMICS IN THE EARLY YEARS OF THE SPACE AGE 

  Narasimha, Roddam (World Scientific Publ Co Pte Ltd, 2014)

  The advent of the space age in 1957 was accompanied by a sudden surge of interest in rarefied gas dynamics (RGD). The well-known difficulties associated with solving the Boltzmann equation that governs RGD made progress ...
• Variable-cell method for stress-controlled jamming of athermal, frictionless grains 

  Smith, Kyle C.; Srivastava, Ishan; Fisher, Timothy S.; Alam, Meheboob (English, 2014)

  @American Physical Society, 2014
• Non-Newtonian stress, collisional dissipation and heat flux in the shear flow of inelastic disks: a reduction via Grad's moment method 

  Saha, Saikat; Alam, Meheboob (English, 2014)

  @Cambridge Univ Press, 2014
• Higher-order effects on orientational correlation and relaxation dynamics in homogeneous cooling of a rough granular gas 

  Rongali, Ramakrishna; Alam, Meheboob (English, 2014)

  @American Physical Society, 2014
• Nonlinear instability and convection in a vertically vibrated granular bed 

  Shukla, Priyanka; Ansari, Istafaul H.; van der Meer, Devaraj; Lohse, Detlef; Alam, Meheboob (English, 2014)

  @Cambridge Univ Press, 2014
• Stochastic dynamics of active swimmers in linear flows 

  Sandoval, Mario; Marath, Navaneeth K.; Subramanian, Ganesh; Lauga, Eric (Cambridge Univ Press, 2014)

  Most classical work on the hydrodynamics of low-Reynolds-number swimming addresses deterministic locomotion in quiescent environments. Thermal fluctuations in fluids are known to lead to a Brownian loss of the swimming ...
• Rotational motion of a thin axisymmetric disk in a low Reynolds number linear flow 

  Singh, Vikram; Koch, Donald L.; Subramanian, Ganesh; Stroock, Abraham D. (American Institute of Physics, 2014)

  The motion of thin, torque-free axisymmetric rigid particles with fore-aft symmetry in low Reynolds number linear flows is investigated. The rotational motion of such a particle is fully determined by the effective aspect ...
• Linearized oscillations of a vortex column: the singular eigenfunctions 

  Roy, Anubhab; Subramanian, Ganesh (Cambridge Univ Press, 2014)

  In 1880 Lord Kelvin analysed the linearized inviscid oscillations of a Rankine vortex as part of a theory of vortex atoms. These eponymously named neutrally stable modes are, however, exceptional regular oscillations that ...
• An inviscid modal interpretation of the 'lift-up' effect 

  Roy, Anubhab; Subramanian, Ganesh (Cambridge Univ Press, 2014)

  In this paper, we give a modal interpretation of the lift-up effect, one of two well-known mechanisms that lead to an algebraic instability in parallel shearing flows, the other being the Orr mechanism. To this end, we ...
• Crystallographic Lattice Boltzmann Method 

  Namburi, Manjusha; Krithivasan, Siddharth; Ansumali, Santosh (Nature Publishing Group, 2016)

  Current approaches to Direct Numerical Simulation (DNS) are computationally quite expensive for most realistic scientific and engineering applications of Fluid Dynamics such as automobiles or atmospheric flows. The Lattice ...
• Normal stress differences, their origin and constitutive relations for a sheared granular fluid 

  Saha, Saikat; Alam, Meheboob (English, 2016)

  @Cambridge University Press, 2016
• Pattern transition, microstructure, and dynamics in a two-dimensional vibrofluidized granular bed 

  Ansari, Istafaul H.; Alam, Meheboob (English, 2016)

  @American Physical Society, 2016
• The effect of inertia on the orientation dynamics of anisotropic particles in simple shear flow 

  Dabade, Vivekanand; Marath, Navaneeth K.; Subramanian, Ganesh (Cambridge University Press, 2016)

  It is well known that, under inertialess conditions, the orientation vector of a torque-free neutrally buoyant spheroid in an ambient simple shear flow rotates along so-called Jeffery orbits, a one-parameter family of ...
• Fokker-Planck model of hydrodynamics 

  Singh, S. K.; Ansumali, Santosh (American Physical Society, 2015)

  We present a phenomenological description of the hydrodynamics in terms of the Fokker-Planck (FP) equation for one-particle distribution function. Similar to the Boltzmann equation or the Bhatnager-Gross-Krook (BGK) model, ...

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