Blar i NTNU Open på forfatter "Ganapathisubramani, Bharathram"
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A comparative study of the velocity and vorticity structure in pipes and boundary layers at friction Reynolds numbers up to 10^4
Zimmerman, Spencer; Philip, Jimmy; Monty, Jason P; Talamelli, A.; Marusic, Ivan; Ganapathisubramani, Bharathram; Hearst, R. Jason; Bellani, Gabriele; Baidya, Rio; Samie, Milad; Zheng, X; Dogan, Eda; Mascotelli, Lucia; Klewicki, Joe (Journal article; Peer reviewed, 2019)This study presents findings from a first-of-its-kind measurement campaign that includes simultaneous measurements of the full velocity and vorticity vectors in both pipe and boundary layer flows under matched spatial ... -
The far wake of porous disks and a model wind turbine: Similarities and differences assessed by hot-wire anemometry
Vinnes, Magnus Kyrkjebø; Gambuzza, Stefano; Ganapathisubramani, Bharathram; Hearst, Robert Jason (Peer reviewed; Journal article, 2022)The wakes of two different porous disks have been evaluated experimentally. Such disks are commonly used as physical actuator disk analogs for wind turbines. One disk is made of a uniform wire mesh, while the other has a ... -
Influence of geometrical parameters on the hysteresis of flutter onset in confined configurations
Jankee, Girish Kumarsing; Ganapathisubramani, Bharathram (Peer reviewed; Journal article, 2022)The interaction between a flow and a flexible structure can provide fascinating insight into the vortex shedding phenomenon and any propagation and mixing characteristics, which relate to a plethora of applications such ... -
Response of the temporal turbulent boundary layer to decaying free-stream turbulence
Kozul, Melissa; Hearst, R. Jason; Monty, Jason P; Ganapathisubramani, Bharathram; Chung, Daniel (Peer reviewed; Journal article, 2020)The turbulent boundary layer developing under a turbulence-laden free stream isnumerically investigated using the temporal boundary layer framework. This studyfocuses on the interaction between the ... -
Robust features of a turbulent boundary layer subjected to high-intensity free-stream turbulence
Hearst, R. Jason; Dogan, Eda; Ganapathisubramani, Bharathram (Journal article; Peer reviewed, 2018)The influence of the large scale organisation of free-stream turbulence on a turbulent boundary layer is investigated experimentally in a wind tunnel through hot-wire measurements. An active grid is used to generate ... -
Simultaneous skin friction and velocity measurements in high Reynolds number pipe and boundary layer flows
Baidya, Rio; Baars, W. J.; Zimmerman, Spencer; Samie, Milad; Hearst, R. Jason; Dogan, Eda; Mascotelli, Lucia; Zheng, X; Bellani, Gabriele; Talamelli, A.; Ganapathisubramani, Bharathram; Hutchins, Nicholas; Marusic, Ivan; Klewicki, Joe; Monty, Jason P (Book, 2019)Streamwise velocity and wall-shear stress are acquired simultaneously with a hot-wire and an array of azimuthal/spanwise-spaced skin friction sensors in large-scale pipe and boundary layer flow facilities at high Reynolds ... -
Spatial characteristics of a zero-pressure-gradient turbulent boundary layer in the presence of free-stream turbulence
Dogan, Eda; Hearst, R. Jason; Hanson, Ronald; Ganapathisubramani, Bharathram (Journal article; Peer reviewed, 2019)Particle image velocimetry (PIV) measurements are performed to examine the structural organization inside a turbulent boundary layer under the influence of free-stream turbulence (FST). In particular, streamwise-wall-normal ... -
The Mean Velocity of the Near-Field of a Lab-Scale Wind Turbine in Tailored Turbulent Shear Flows
Li, Leon; Hearst, R. Jason; Ganapathisubramani, Bharathram (Chapter, 2019)This study investigated the mean velocity of the near-field wake of a lab-scale wind turbine subjected to seven different incoming turbulent shear flows through particle image velocimetry. An active grid was used to generate ... -
The near-field of a lab-scale wind turbine in tailored turbulent shear flows
Li, Leon; Hearst, R. Jason; Ferreira, Manuel A.; Ganapathisubramani, Bharathram (Journal article; Peer reviewed, 2020)Real wind turbines experience a wide range of turbulent shear flows that naturally occur within the atmospheric boundary layer, however, these are often difficult to simulate in experiments. An active grid was used to ... -
Time evolution of uniform moment zones in a turbulent boundary layer
Laskari, Angeliki; de Kat, Roeland; Hearst, R. Jason; Ganapathisubramani, Bharathram (Journal article; Peer reviewed, 2018)Time-resolved planar particle image velocimetry (PIV) was used to analyse the structuring of a turbulent boundary layer into uniform momentum zones (UMZs). The instantaneous peak detection method employed by Adrian et al. ... -
Uniform-momentum zones in a turbulent boundary layer subjected to freestream turbulence
Hearst, Robert Jason; de Silva, Charitha; Dogan, Eda; Ganapathisubramani, Bharathram (Peer reviewed; Journal article, 2021)The instantaneous structure of a turbulent boundary layer that has developed beneath freestream turbulence (FST) was investigated with planar particle image velocimetry. Measurements were performed in the streamwise–wall-normal ...