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Explore how groove spacing on vertical surfaces controls water retention during condensation in this 33-minute journal club presentation. Examine systematic experimental research that quantifies liquid retention on substrates with parallel vertical grooves, revealing how spacing determines the transition between droplet shedding and capillary drainage. Discover two distinct regimes separated by the droplet detachment radius: large spacings where grooves function as passive reservoirs that increase retention, and narrow spacings that trigger drainage to limit droplet growth and reduce retention below smooth surface levels. Learn about simple asymptotic models that capture these phenomena and understand practical design rules for optimizing condensation-retention systems in heat exchangers and water harvesting applications.
