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  • Video 
    PAIR seminar : collecting fog droplets using microfiber grids

    PAIR seminar : collecting fog droplets using microfiber grids

    Water shortage is one of the biggest challenges that humanity faces. Novel technologies to tackle the challenge of water scarcity are urgently needed. However, all the existing studies are based on bare fibers with diameter in the order of mm. This talk introduces a novel fog collection technology using microfibers fabricated by near-field electrospinning. The collection efficiency reaches a record high level. Systematic investigation reveals that the waterdrops are “visible” to fog droplets in the incoming air flow because of the relatively small size of the microfibers. Thus, the large waterdrops deflect the fog-carrying airflow to the satellite small waterdrops, which effectively intercept the fog droplets.
    Event Date: 12/10/2023
    Speaker: Prof. TAN Zhongchao (Founding Chair Professor, Vice Provost and Dean of Academic Affairs of the Eastern Institute of Technology in Ningbo, China)
    Hosted by: PolyU Academy for Interdisciplinary Research

    Subjects:
    Environmental Sciences and Mechanical Engineering
    Keywords:
    Fog Hydrology Water harvesting Water-supply
    Resource Type:
    Video
     
  • Video 
    The 100 Year Flood Is Not What You Think It Is (Maybe)

    The 100 Year Flood Is Not What You Think It Is (Maybe)

    Almost everyone agrees that flooding is bad. Most years it’s the number one natural disaster in the US by dollars of damage. So being able to characterize flood risks is a crucial job of civil engineers. Engineering hydrology has equal parts statistics and understanding how society treats risks. Water is incredibly important to us, and it shapes almost every facet of our lives, but it’s almost never in the right place at the right time. Sometimes there’s not enough, like in a drought or just an arid region, but we also need to be prepared for the times when there’s too much water, a flood. Rainfall and streamflow have tremendous variability and it’s the engineer’s job to characterize that so that we can make rational and intelligent decisions about how we develop the world around us.

    Subjects:
    Hydraulic Engineering and Disaster Control and Management
    Keywords:
    Floods Hydrology Flood control -- Management
    Resource Type:
    Video