Characterizing the liquid dynamics in cocurrent gas–liquid flows in porous media using twin-plane electrical capacitance tomography
作者： M. Hamidipour , F. Larachi
DOI: 10.1016/J.CEJ.2010.08.058
关键词: Porous medium 、 Materials science 、 Plane (geometry) 、 Particle 、 Electrical capacitance tomography 、 TRACER 、 Volumetric flow rate 、 Calibration 、 Mechanics 、 Volumetric flux 、 Mineralogy
摘要: Abstract The hydrodynamics of gas–liquid cocurrent down- and upflow packed beds was studied experimentally using twin-plane electrical capacitance tomography (ECT). ability ECT to measure liquid holdups examined by performing different calibration procedures. Confrontation holdup measurements from single-/twin-plane ECT, RTD bed drainage revealed that between pre-wetted flooded captured accurately the free-draining holdups. A new modality imaging tracer transients, referred as ECT/RTD, proposed whereby upstream injections detection permittivity-contrasting impulsions allowed access, via voxel-affixed cross-correlation analyses, interstitial velocity, volumetric flux maps well their degrees uniformity. Single-plane successful at monitoring dynamics showing its dependence with respect gas flow rates particle sizes, identify regime transitions unveil relationships pulse frequency velocity diameter fluid throughputs in downflow.
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