Flow visualization and beyond

Helmholtz Hodge decomposition of scalar optical fields

“…This is also the component that is devoid of any singularities and can, therefore, be used as a vortex free field wherever required. We believe that the HHD will also augment the flow visualization using optical methods [25] for several other fields including velocity, pressure and temperature. …”

“…The irrotational term is devoid of any singularities and can be used as a vortex free field, wherever required. We believe that this method will augment the flow visualization of velocity, pressure and temperature using optical methods [25].…”

Perceptive communicating capsules for fluid flow measurement and visualisation

“…Numerous techniques are used for the flow measurement and flow visualisation in complex geometries. 1,2 To name just a few, some examples include: particle imaging velocimetry (PIV), 3 laser Doppler velocimetry, 4 streak photography, 5 the use of dye or tracer particles, 6,7 electrical capacitance tomography 8 and ultrasound velocity profiling. 9 Experimental measurement and visualisation techniques are used to understand the dynamics of fluid flow and to validate the theoretical predictions and computational fluid dynamics (CFD) models.…”

Multi-scale approach for analyzing convective heat transfer flow in background-oriented Schlieren technique

“…For flow visualization, optical methods constitute an important class of measurement techniques because of non-invasive operation, full-field measurement and capability to provide both qualitative and quantitative insights with good sensitivity [1,2]. Some of the prominent optical techniques for flow visualization are outlined in [3]. Among these, beam deflection approach based on background distortion [4] is relatively popular for flow visualization because of relative ease of operation, digital data processing, cost-effective design and robustness against external disturbances.…”