Construction and demolition waste management in India: A case study of Ahmedabad city

Ahmedabad is the largest city in the state of Gujarat and the 5th largest in India in terms of population. It is one of the most important economic and industrial hubs in India. Additionally it is one of the fastest growing cities in India, leading to large infrastructural projects including metro rail and river front. Construction is also...

Sweeping has no effect on renormalized turbulent viscosity

We perform renormalization group analysis (RG) of the Navier-Stokes equation in the presence of constant mean velocity field $\mathbf U_0$, and show that the renormalized viscosity is unaffected by $\mathbf U_0$, thus negating the ``sweeping effect", proposed by Kraichnan [Phys. Fluids {\bf 7}, 1723 (1964)] using random Galilean invariance....

A Unified Shell model for Buoyancy-Driven Turbulence

We construct a unified shell model for stably stratified and convective turbulence. Shell model simulation of stably stratified flow in turbulent regime exhibit Bolgiano-Obukhbov (BO) scaling in which the kinetic energy spectrum varies as $k^{-11/5}$. However, simulation of convective turbulence shows Kolmogorov's spectrum. These results are...

Energy transfers in small-scale and large-scale dynamos

We study energy transfers during magnetic energy growth in small-scale and large-scale dynamos. We perform direct numerical simulations for magnetic Prandtl number Pm =20 and 0.2 in a periodic box on 1024^3 grid. Energy fluxes and shell-to-shell energy transfers indicate that in small-scale dynamo for Pm =20, the magnetic energy growth takes...

Development and Application of PP-CNT Composite for Hummingbird Inspired MAV Flapping Wings

Micro Air Vehicles (MAVs) are small unmanned aircrafts which have a maximum size limit of 150 mm in any direction. They can be used for surveillance, reconnaissance, targeting, etc. To perform such missions, MAVs are required to hover. Hummingbirds, having excellent flight characteristics (such as hovering, ability to fly in any direction,...

Deformation Analysis of a Hummingbird Inspired MAV Flapping Wing using Digital Image Correlation

Flapping wing micro air vehicles (MAVs) have the advantage of being able to fly at slow speeds and have high maneuverability. The design of a flapping wing MAV inspired by birds presents many technical challenges because birds as natural fliers exhibit higher efficiency than any man made flapping wing structure. Thus, the structure and motion of...