vilasjshinde

Fluidelastic instability in heat-exchanger tube bundles: RANS, LES analysis

Heat exchangers are widely used in the power generation industries. Particularly, the cross-flow type of heat exchangers are a commonplace. Operating heat exchangers at higher flow rates enhance the heat transfer, due to increased flow turbulence; however, the higher flow rates may lead to flow-induced vibrations. Flow induced vibration in heat exchanger tube bundles hasContinue reading “Fluidelastic instability in heat-exchanger tube bundles: RANS, LES analysis”

Turbulent two-point correlation statistics using DNS database

Understanding the role of pressure fluctuations in wall turbulence is of significant practical interests. In incompressible flows, due to elliptic nature of the Navier-Stokes equations, the pressure at a location is affected by the momentum fluctuations in the entire domain. However, the effects in the near-location (wall) region are stronger, and can be attributed toContinue reading “Turbulent two-point correlation statistics using DNS database”

CFD applications in cement industry

The cement manufacturing process consists of multiphysics flow including particle laden gas flow, combustion, and heat transfer. Furthermore, the Reynolds numbers involved are typically much higher than tractable for high-fidelity CFD simulation techniques such as large eddy simulation (LES). Thus, Reynolds averaged Navier-Stokes (RANS) approach of modeling turbulence for CFD simulations is the industry standard,Continue reading “CFD applications in cement industry”

CFD applications in heating, ventilation and air-conditioning

In the quest of energy efficient futuristic buildings, CFD plays an important role in understanding and effectively using the air circulation patterns for maximum comfort constrained to minimum energy demand. In general, the flow geometries in heating, ventilation, and air-conditioning (HVAC) applications comprise large open spaces and small gaps between structures, posing difficulties for costContinue reading “CFD applications in heating, ventilation and air-conditioning”

Benzene nitration in vapor phase on a solid acid catalyst

Nitration of benzene produces nitrobenzene, an important compound that is used as a solvent and an intermediate in the manufacturing of organic compounds. Nitrobenzene is typically produced in industry by using liquid phase nitration of benzene, where the process uses nitric and sulfuric acids in a highly exothermic reaction. In the process, sulfuric acid needsContinue reading “Benzene nitration in vapor phase on a solid acid catalyst”