Particle image velocimetry (PIV) and particle tracking velocimetry (PTV) are two popular methods to measure the velocity in complex geometries such as the Tesla valve. This paper provides an investigation on the application of a tessellation meshing method for interpolating non-uniform velocity vectors calculated using PTV. The procedure to apply this method containing mask generation and mesh study is described. The results are compared to the PIV results particularly where the near wall results are important. The result of the flow field calculated by the application of the tessellation method on the PTV results are presented for a two-stage Tesla valve operated in the range of Re = 100 to 600 both in forward and reverse configuration.
Microfluidic devices are now more commonly used for various applications in medical diagnosis, pharmaceutical and agricultural applications. Flow structure in these devices can be useful for passive manipulations. Therefore, developing an experimental investigation to study a common geometry in micro devices such as the flow in a curved channel can be a booster in designing high performance microfluidic devices. The paper provides a study on the implementation of the scanning μPTV in a micro device. It also investigates the application of a tessellation approach to refine the near wall data using a high quality triangular mesh. The out-of-plane velocity calculation method is also developed to reconstruct the 3D velocity field inside the microchannel device.
Experimental study of Rayleigh-Benard convection (RBC) requires 3D measurement of the velocity and temperature due to the complexity of the physics of this system. Using a scanning system, the application of the 3D particle image velocimetry (PTV) and 3D time-resolved two-color laser-induced fluorescence (LIF) is investigated on a slender RBC cell. Calculation of the out-of-plane velocity component by using the planar velocity components and applying the continuity law is discussed. From these observations that calculation of the dimensionless heat transfer coefficient, the Nusselt number from the 3D reconstructed temperature field close to the boundary of the fluid domain is investigated.
In this paper, the liquid sheet properties of two impinging jets with different diameter are investigated with the Reynolds number of jets Re j ranging from 81 to 243. Shadowgraph imaging and image processing have been applied to capture the liquid sheet and analyse its properties. Results show that two impinging jets with different diameter but with the same velocity of the jets forms a stable and laminar liquid sheet. However, the liquid sheet of two jets with the different diameter but with the same momentum of the jets is unstable fragmenting liquid ligaments and droplets in a specific diameter difference criterion.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.