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Moisture absorption rates via capillary suction within packed beds

Images related to a published paper on moisture absorption rates via capillary action - effect of bed and fluid properties.  


Figure 1a: Illustration of surface tension effects using a fluid droplet on a solid surface


Figure 1b: Illustration of surface tension effects in a capillary of constant diameter


Figure 1c: Illustration of surface tension effects using liquid held between two spherical particles


Figure 2: Moisture retention mechanisms in a particle cluster with variable pore sizes


Figure 3a: Glass shards used as a packing material 


Figure 3b: Greywacke used as a packing material


Figure 3c: Malachite ore used as a packing material


Figure 4: Illustration of the experimental set-up used to conduct capillary suction tests on the packing materials


Figure 5: Effect of two parameters in an empirical model for fluid absorption rates via capillary suction


Figure 6: Bulk density and bed voidage data for the different packed bed systems


Figure 7: Experimental and model predicted values for the mass of soution absorbed during water capillary suction tests by packed beds composed of different materials and different sizes


Figure 8: Optimized model parameter values based on the fitting of the experimental data obtained from capillary suction tests on the different material beds using water as the testing fluid. 


Figure 9: Experimental and model predicted values for the mass of solutions of different viscosities absorbed during capillary suction tests on malachite ore bed with different particle sizes: (a) 0.1–0.5 mm, (b) 0.5–1.0 mm, (c) 1.0–2.0 mm and (d) 2.0–2.8 mm


Figure 10: Optimized model parameter values based on the fitting of the experimental data obtained from capillary suction tests on MO beds using different viscosity fluids. 

Funding

Mintek

NRF through SARChI chair at Bioprocess Engineering

History

Department/Unit

Centre for Bioprocess Engineering Research, Department of Chemical Engineering, University of Cape Town

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