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Papers by BHUPENDRA MORE gs0500272
Experimental Thermal and Fluid Science, Nov 1, 2015
Journal of Fluids Engineering, 2019
In this study, the flow field over three square cylinders (SCs) arranged side by side is investig... more In this study, the flow field over three square cylinders (SCs) arranged side by side is investigated in a low-speed wind tunnel. The experiments are performed with three similar SCs for Reynolds number (Re) 295. The influences of spacing ratio on the wake size, drag coefficient, and flow interference of the cylinders are reported with the hotwire anemometry, particle image velocimetry (PIV), and the flow visualization techniques. Special attention is paid to the oscillation given to the middle cylinder and its effect on flow structure and related forces. The spacing ratio (s/D) ranges from 1.5 to 3, whereas the forcing frequency ratio ranges from 0.5 to 2 with amplitude of 10% of the cylinder width. It is observed that the spacing influences the flow structure, and the vortex shedding mechanism strongly. A secondary frequency appears in the flow field for spacing ratio s/D = 2 and 3. Depending upon the spacing ratios, the flow pattern is seen to be asymmetric biased, symmetric bias...
Journal of Fluids and Structures, 2018
Lecture Notes in Mechanical Engineering, 2016
When two cylinders are in proximity with each other the vortex shedding of one cylinder are influ... more When two cylinders are in proximity with each other the vortex shedding of one cylinder are influenced by the other. The flow field becomes even more complex when one cylinder subjected to an oscillation. In present study flow around two inline square cylinders of aspect ratio 50 at different spacing ratio is investigated experimentally. Experiments are performed for two identical square cylinders of 6 mm diameter at Reynolds number 500 in a low speed wind tunnel using Particle image velocimetry (PIV) and hotwire anemometer (HWA). The upstream cylinder is given predetermined oscillation and the gap between the two cylinders varied over wide range. Present study focused on effect of forcing frequency and spacing between centers of two cylinders (s/D = 1.5–5.0). The upstream cylinder is oscillated in transverse direction at f/f0 = 0 to 2 and the effect of this oscillation is observed behind the downstream stationary cylinder at different spacing of the cylinders by hotwire.
Lecture Notes in Mechanical Engineering, 2016
Flow over a square prism with attached splitter plate is investigated at Reynolds number 485. Spl... more Flow over a square prism with attached splitter plate is investigated at Reynolds number 485. Splitter plate attached on the base of a square prism acts as a control for wake modification. By varying the splitter plate length the wake structure can be manipulated according to the need. In present study, we investigated the effect of splitter plate length attached to a square prism using Particle image velocimetry (PIV) and flow visualization techniques. The results are compared for both configurations with and without splitter plate. The length of the splitter plate are varies over wide range (L/D = 0−5) to characterize the near wake structure. Splitter plate thickness kept nominal with respect to cylinder size (0.1D). Increase in length of splitter plate changes the shear layer roll up distance and hence vortex formation region. Drag coefficient is reduced up to 41 % with the splitter plate as compared to prism without splitter plate. The detailed flow structures are investigated from flow visualization, velocity contours and vorticity contours.
Journal of Fluids Engineering, 2016
This paper presents an experimental study of flow over a square cylinder oscillating in transvers... more This paper presents an experimental study of flow over a square cylinder oscillating in transverse direction. The Reynolds number selected for present study is 485. Limited study has also been made for two other Reynolds numbers, namely, 295 and 775. The objective of the present study is to modify the near-wake flow structure using actuation of the cylinder for possible reduction in drag force. Transverse oscillations to the cylinder are provided using electromagnetic actuators. The flow field is investigated using two-dimensional (2D)-particle image velocimetry (PIV) system, hotwire anemometer (HWA), as well as flow visualization techniques. The effect of oscillation frequency and the amplitude on parameters like Strouhal number, drag coefficient, recirculation length, power spectrum, and Reynolds stress are studied. It is observed that the recirculation length is reduced significantly with increase in forcing frequency, and consequently drag coefficient is also reduced. For a cons...
Materials Today: Proceedings, 2022
Experimental Thermal and Fluid Science, Nov 1, 2015
Journal of Fluids Engineering, 2019
In this study, the flow field over three square cylinders (SCs) arranged side by side is investig... more In this study, the flow field over three square cylinders (SCs) arranged side by side is investigated in a low-speed wind tunnel. The experiments are performed with three similar SCs for Reynolds number (Re) 295. The influences of spacing ratio on the wake size, drag coefficient, and flow interference of the cylinders are reported with the hotwire anemometry, particle image velocimetry (PIV), and the flow visualization techniques. Special attention is paid to the oscillation given to the middle cylinder and its effect on flow structure and related forces. The spacing ratio (s/D) ranges from 1.5 to 3, whereas the forcing frequency ratio ranges from 0.5 to 2 with amplitude of 10% of the cylinder width. It is observed that the spacing influences the flow structure, and the vortex shedding mechanism strongly. A secondary frequency appears in the flow field for spacing ratio s/D = 2 and 3. Depending upon the spacing ratios, the flow pattern is seen to be asymmetric biased, symmetric bias...
Journal of Fluids and Structures, 2018
Lecture Notes in Mechanical Engineering, 2016
When two cylinders are in proximity with each other the vortex shedding of one cylinder are influ... more When two cylinders are in proximity with each other the vortex shedding of one cylinder are influenced by the other. The flow field becomes even more complex when one cylinder subjected to an oscillation. In present study flow around two inline square cylinders of aspect ratio 50 at different spacing ratio is investigated experimentally. Experiments are performed for two identical square cylinders of 6 mm diameter at Reynolds number 500 in a low speed wind tunnel using Particle image velocimetry (PIV) and hotwire anemometer (HWA). The upstream cylinder is given predetermined oscillation and the gap between the two cylinders varied over wide range. Present study focused on effect of forcing frequency and spacing between centers of two cylinders (s/D = 1.5–5.0). The upstream cylinder is oscillated in transverse direction at f/f0 = 0 to 2 and the effect of this oscillation is observed behind the downstream stationary cylinder at different spacing of the cylinders by hotwire.
Lecture Notes in Mechanical Engineering, 2016
Flow over a square prism with attached splitter plate is investigated at Reynolds number 485. Spl... more Flow over a square prism with attached splitter plate is investigated at Reynolds number 485. Splitter plate attached on the base of a square prism acts as a control for wake modification. By varying the splitter plate length the wake structure can be manipulated according to the need. In present study, we investigated the effect of splitter plate length attached to a square prism using Particle image velocimetry (PIV) and flow visualization techniques. The results are compared for both configurations with and without splitter plate. The length of the splitter plate are varies over wide range (L/D = 0−5) to characterize the near wake structure. Splitter plate thickness kept nominal with respect to cylinder size (0.1D). Increase in length of splitter plate changes the shear layer roll up distance and hence vortex formation region. Drag coefficient is reduced up to 41 % with the splitter plate as compared to prism without splitter plate. The detailed flow structures are investigated from flow visualization, velocity contours and vorticity contours.
Journal of Fluids Engineering, 2016
This paper presents an experimental study of flow over a square cylinder oscillating in transvers... more This paper presents an experimental study of flow over a square cylinder oscillating in transverse direction. The Reynolds number selected for present study is 485. Limited study has also been made for two other Reynolds numbers, namely, 295 and 775. The objective of the present study is to modify the near-wake flow structure using actuation of the cylinder for possible reduction in drag force. Transverse oscillations to the cylinder are provided using electromagnetic actuators. The flow field is investigated using two-dimensional (2D)-particle image velocimetry (PIV) system, hotwire anemometer (HWA), as well as flow visualization techniques. The effect of oscillation frequency and the amplitude on parameters like Strouhal number, drag coefficient, recirculation length, power spectrum, and Reynolds stress are studied. It is observed that the recirculation length is reduced significantly with increase in forcing frequency, and consequently drag coefficient is also reduced. For a cons...
Materials Today: Proceedings, 2022