The objective of this thesis is to analyse and compare the flow around cylindrical bluff bodies in a rectangular towing tank using the Particle Image Velocimetry Technique (PIV), in which the vector fields and relative properties are analysed. Water at room temperature is utilized as the fluid medium and glass spheres are used as the seeding particles to view the flow around the bodies. The fluid flows along a rectangular cross section with a length of 2 metres and the bluff bodies are placed 1.5 metre away from the entrance of the fluid with a honeycomb structure placed in the entrance to get a streamlined flow. The flow around bluff bodies are investigated for two Reynolds number with values 748.5 and 499, and have been analysed for properties like vortex shedding, flow separation region, etc.
Anotace v angličtině
The objective of this thesis is to analyse and compare the flow around cylindrical bluff bodies in a rectangular towing tank using the Particle Image Velocimetry Technique (PIV), in which the vector fields and relative properties are analysed. Water at room temperature is utilized as the fluid medium and glass spheres are used as the seeding particles to view the flow around the bodies. The fluid flows along a rectangular cross section with a length of 2 metres and the bluff bodies are placed 1.5 metre away from the entrance of the fluid with a honeycomb structure placed in the entrance to get a streamlined flow. The flow around bluff bodies are investigated for two Reynolds number with values 748.5 and 499, and have been analysed for properties like vortex shedding, flow separation region, etc.
The objective of this thesis is to analyse and compare the flow around cylindrical bluff bodies in a rectangular towing tank using the Particle Image Velocimetry Technique (PIV), in which the vector fields and relative properties are analysed. Water at room temperature is utilized as the fluid medium and glass spheres are used as the seeding particles to view the flow around the bodies. The fluid flows along a rectangular cross section with a length of 2 metres and the bluff bodies are placed 1.5 metre away from the entrance of the fluid with a honeycomb structure placed in the entrance to get a streamlined flow. The flow around bluff bodies are investigated for two Reynolds number with values 748.5 and 499, and have been analysed for properties like vortex shedding, flow separation region, etc.
Anotace v angličtině
The objective of this thesis is to analyse and compare the flow around cylindrical bluff bodies in a rectangular towing tank using the Particle Image Velocimetry Technique (PIV), in which the vector fields and relative properties are analysed. Water at room temperature is utilized as the fluid medium and glass spheres are used as the seeding particles to view the flow around the bodies. The fluid flows along a rectangular cross section with a length of 2 metres and the bluff bodies are placed 1.5 metre away from the entrance of the fluid with a honeycomb structure placed in the entrance to get a streamlined flow. The flow around bluff bodies are investigated for two Reynolds number with values 748.5 and 499, and have been analysed for properties like vortex shedding, flow separation region, etc.
This thesis deals with the experimental investigation of the flow around the bluff body in water as a working fluid. The PIV method for velocity fields investigation is used.
Make the state of art of the problem.
Design the experimental setup and the bluff body (cylinder with a slot inside).
Perform the 2D PIV experiments of the bluff body and with the (full) cylinder. Compare and describe these experiments according to the fluid dynamics theory.
Analyze your data and do the comparison with the literature.
Zásady pro vypracování
This thesis deals with the experimental investigation of the flow around the bluff body in water as a working fluid. The PIV method for velocity fields investigation is used.
Make the state of art of the problem.
Design the experimental setup and the bluff body (cylinder with a slot inside).
Perform the 2D PIV experiments of the bluff body and with the (full) cylinder. Compare and describe these experiments according to the fluid dynamics theory.
Analyze your data and do the comparison with the literature.
Seznam doporučené literatury
\matsymb{lbrack}1\matsymb{rbrack} {WIENEKE, Bernhard. PIV Uncertainty Quantification and Beyond.} Unpublished {[online]. 2017 [vid. 2019-04-25]. Dostupné z: doi:10.13140/rg.2.2.26244.42886}
\matsymb{lbrack}2\matsymb{rbrack} {NEETESON, N. J., S. BHATTACHARYA, D. E. RIVAL, D. MICHAELIS, D. SCHANZ a A. SCHRÖDER. Pressure-field extraction from Lagrangian flow measurements: first experiences with 4D-PTV data.} Experiments in Fluids {[online]. 2016, 57(6) [vid. 2019-04-25]. ISSN 0723-4864, 1432-1114. Dostupné z: doi:10.1007/s00348-016-2170-4}
Seznam doporučené literatury
\matsymb{lbrack}1\matsymb{rbrack} {WIENEKE, Bernhard. PIV Uncertainty Quantification and Beyond.} Unpublished {[online]. 2017 [vid. 2019-04-25]. Dostupné z: doi:10.13140/rg.2.2.26244.42886}
\matsymb{lbrack}2\matsymb{rbrack} {NEETESON, N. J., S. BHATTACHARYA, D. E. RIVAL, D. MICHAELIS, D. SCHANZ a A. SCHRÖDER. Pressure-field extraction from Lagrangian flow measurements: first experiences with 4D-PTV data.} Experiments in Fluids {[online]. 2016, 57(6) [vid. 2019-04-25]. ISSN 0723-4864, 1432-1114. Dostupné z: doi:10.1007/s00348-016-2170-4}
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