![]() However I am not sure that it is even possible for drops to form at the end of the wick. I found a further reply by the author suggesting that the wick they hung from the top of the capillary tube was long enough so that a drop forming on the bottom of the wick would just touch the surface of the water below which would then draw out the water from the wick. Thanks for your replies, I agree that the video doesn't look quite right. As it is a short theoretical project I don't have enough time to fully explore but for my own interest I would like to understand whether this potential for perpetual water flow is possible or not? I would be really grateful for any comments, I am an architecture student looking into the properties of wicking materials for the design of a pavilion that could provide evaporative cooling and thermal mass. This would seem to me to break the rules of energy conservation and therefore not be possible unless there is something I am missing. However in this article " the author claims to have set up an experiment where water can be sucked up a capillary tube into a wicking material and leave at a higher point than it started. If you then raise one end out of the glass will it continue to drip? Everything I have read would suggest no, in order to do this the surface tension would have to break (as I understand) and it is suggesting a continuous flow of water may be possible. Eventually the water level in each glass will equate. ![]() To illustrate I have done a number of common experiments such as a paper napkin or paper towel siphon from one glass to another. Although capillary action can be used to explain the properties of 'wicking' materials that can raise water vertically I am unsure as to whether it is possible to collect that water at a point higher than it started. doi:10.1016/j.det.2017.11.I know there have been a number of posts relating to capillary action but after reading through them I cannot find an obvious answer to my query. Mechanisms of age-related macular degeneration. The consequences of COVID-19 pandemic on patients with monoclonal gammopathy-associated systemic capillary leak syndrome (Clarkson disease). Pineton de Chambrun M, Moyon Q, Faguer S, Urbanski G, Mathian A, Zucman N, et al. Anticancer Drug-Induced Capillary Leak Syndrome. Izzedine H, Mathian A, Amoura Z, Ng JH, Jhaveri KD. Capillary malformation–arteriovenous malformation Syndrome. Annales de Dermatologie et de Vénéréologie. Syndrome de Fegeler, angiome plan acquis ou malformation capillaire acquise : trois observations et revue de la littérature. ![]() Capillary blood sampling: national recommendations on behalf of the Croatian Society of Medical Biochemistry and Laboratory Medicine. Krleza JL, Dorotic A, Grzunov A, Maradin M Croatian Society of Medical Biochemistry and Laboratory Medicine. Archives of Disease in Childhood - Education & Practice Edition. Treasure Island (FL): StatPearls Publishing. Oxygen transport in the microcirculation and its regulation. Blood vessel adaptation with fluctuations in capillary flow distribution. The blood-brain barrier: an engineering perspective. Wong AD, Ye M, Levy AF, Rothstein JD, Bergles DE, Searson PC. Anatomy and Histology of the Laboratory Rat in Toxicology and Biomedical Research. Evolutionary origins of the blood vascular system and endothelium. Classification & Structure of Blood Vessels. Structure and functions of blood vessels and vascular niches in bone.
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