This work reports experimental data obtained by measuring bubble sizes with an innovative technique based on the cross correlation between two optical probes.
The conventional methods using image analysis to measure bubble size are limited in their robustness and applicability in highly turbulent bubbly flows.
For the validation of bubble force models measured bubble size distributions were taken as an input for the calculation.
A wire-mesh sensor with a time resolution of 1.2 kHz was used to measure bubble size distributions in a gas-liquid flow.
A flying optical probe technique has been developed and employed to measure bubble size above sieve trays in an air water facility simulating cross-flow distillation (CRODIS).
The first objective of the current work was to measure bubble size distributions at points throughout a pressure-step dough mixing process using a non-synchrotron X-ray source.
The actually measured bubble sizes, the respective slip velocity values in transverse and axial directions and the local shear rates enabled the verification of known formulations for the lift coefficient (CL) for bubbles.
By measuring the bubble size and the rising speed from the bubble motion data captured by a personal computer, we could precisely estimate the drag coefficients and the Sherwood number for the dissolution of gas bubbles at Reynolds numbers below 100.
Present work describes the development of a non-intrusive image analysis technique to measure the bubble size distribution in bubbly flows.
