Control of Transitional SBLI The potential of surface morphing techniques, including passive shock control bumps (SCB) and active surface morphing, is explored to control transitional shock wave boundary layer interactions (SWBLI). In addition to reducing the size of the separation bubble, a key objective is to mitigate the low-frequency unsteadiness that can cause detrimental structuralContinue reading “Supersonic flow separation control using surface morphing”
Category Archives: High-Fidelity Simulations
Shock wave boundary layer interaction over flexible panel
Shock wave boundary layer interaction (SBLI) exhibits low frequency unsteadiness, which can interact with structural modes, giving rise to detrimental fluid-structure interactions. To investigate the physics of these interactions, we perform high-fidelity simulations of transitional and turbulent SBLI over flexible surfaces. Transitional SBLI over flexible panel We investigate a full 3-D transitional SBLI over aContinue reading “Shock wave boundary layer interaction over flexible panel”
Inflow turbulence generation for large eddy simulation
Digital Filtering Technique Digital Filtering (DF) is an efficient method to generate the inflow turbulence, which is an important parameter that can affect the physics of interest. In most of our supersonic LES simulations, we employ the digital filter procedure that is originally proposed by Klein et al. (2003), and later improved by Xu etContinue reading “Inflow turbulence generation for large eddy simulation”
Flow-induced vibration in sodium-cooled fast reactor
The core of sodium fast breeder reactor (Na-FBR) comprises hexagonal slender structures arranged in a very confined manner. The flow of liquid sodium through the cavities and the hexagonal structures lead to complex fluid-structure interaction. To investigate the flow induced vibration, we performed large eddy simulations (LES) alongside the ongoing experimental efforts in French alternativeContinue reading “Flow-induced vibration in sodium-cooled fast reactor”
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”
Vilas Shinde 