Novel Hybrid Heat Transfer probe and 4-point optical probe Technique
In the process of design is a Novel hybrid measurement technique that combines both the fast-response heat transfer probe and four-point optical probes for gas-liquid and gas-liquid solid/fines systems. The hybrid techniques will have the capacity to measure simultaneously the heat flux, surface temperature, bulk temperature and bubble dynamics at the vicinity of the heating surface in terms of local phase holdups, bubble velocity, chord length, passage frequency, direction, local gas velocity, specific interfacial area among others and their populations. With this novel technique the bubble parameters will be directly measured and detailed information can be extracted and used to mechanistically examine the dependence of heat transfer rate and coefficients on bubble properties. The development includes the needed data acquisition system that synergizes the measurements of the technique and the needed algorithms and programs for data processing and analyses. Figure 9. Shows a schematic of the hybrid probe.