These are fiber optical probes that are based on the combined use of fiber optic sensors and GRIN lenses (graded refractive indes lenses). The CREC-GS sensor generates a focal region with high light energy density 5mm away from the probe tip. These optiprobes have been successfully employed in downflow gas-solid reactors, to characterize solid flow patterns.
These fiber optical probes consist of various components: a) a GRIN lens, b) an emitter optical fiber, and c) a receiver optical fiber. The laser beam is focused at the emitter fiber end and helps to create with the GRIN lens, a focal region in front of the CREC-GS-Optiprobe. Solid particles crossing the focal region are detected with minimum flow disturbance.
The CREC - GS - Optiprobes can measure undisturbed axial particle cluster velocities, axial cluster slip velocities, cluster sizes and solid fractions in gas - solid catalytic reactors.
The CREC - GS - Optiprobes support CPFD (Computational Particle Fluid Dynamic) numerical calculations.
The CREC -GS - Optiprobes, when placed in a fully developed flow regime, introduce minimum perturbations in a gas - solid suspension.
The CREC - GS - Optiprobes create a highly illumated focal region where hydrodynamic parameters can be measured without significant flow disturbance.