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Prajwal

Publications and source records attributed to Prajwal.

2 recordsLinked to original sources

Traffic control Management System and Collision Avoidance System

Many road accidents occur due to drivers failing to read sign board due to various reasons. Especially at night, the tiredness of driver reduces his perception to small things like speed limit of sign the board, curve ahead sign board. For the smooth movement of ambulance in cities during traffic, is to create an IOT device to detect sign boards and also able to com-municate with the traffic light and makes way for ambulance. Implementation is done by detecting sign boards and measuring speed of vehicle using arduino and RF transmitter which transmits the specific beep sound to specific type of application like speed breaker, school zone etc. The vehicle also contains RF receiver and arduino, which starts receiving the beep sound when near to sign board. After receiving the code, arduino starts measuring the current speed of vehicle and if the speed is above recommended speed then it starts gives alert. If the vehicle speed is not reduced even after the alert then the vehicle will auto break. With the help of this Traffic Management System (TMS), we can record the number of users who do not reduce vehicle speed even when prompted by the system alerts.

cs.CY

Signature of coalescence during scalar mixing in a Rankine vortex

We analyze the dynamics of solute mixing in a vortex flow. The transport of a passive tracer is considered in a Rankine vortex. The action of a shear flow, in general, is to achieve stretching of fluid elements. A vortex flow exhibits stretching and folding of fluid elements in a way which brings adjacent fluid elements closer every turn. A strong stretching along the direction of rotation is accompanied by a concomitant thinning in the radial direction leading to a strong diffusive flux which may cause material from neighbouring regions of the mixing interface to aggregate. Through a Lagrangian concentration evolution technique, the diffusive strip method, we obtain the concentration field and pinpoint the signature of coalescence of two neighbouring concentration regions by analyzing the concentration distribution profiles. We link coalescence with reactivity for mixing-limited reactive flows. The analysis is useful to understand scalar dispersion in vortical flow structures.

physics.flu-dyn