{"188011":{"#nid":"188011","#data":{"type":"event","title":"Consider the Icicle","body":[{"value":"\u003Ch4\u003E\u0026nbsp;School of Physics Colloquium Series: Presenting Stephen Morris, University of Toronto\u003C\/h4\u003E\u003Cp\u003E\u0026nbsp;Icicles are harmless and picturesque winter phenomena, at least in cold climates. \u0026nbsp;The shape of an icicle emerges from a subtle feedback between ice formation, which is controlled by the release of latent heat, and the flow of water over the evolving shape. \u0026nbsp;The water flow, in turn, determines how the heat flows. \u0026nbsp;The air around the icicle is also flowing, and all forms of heat transfer are active in the air. \u0026nbsp;Ideal icicles are predicted to have a universal \u0022platonic\u0022 shape, independent of growing conditions. \u0026nbsp;In addition, many natural icicles exhibit a ripply shape, which is the result of a morphological instability. \u0026nbsp;The wavelength of the ripples is also remarkably independent of the growing conditions. \u0026nbsp;Similar shape and ripple phenomena are also observed on stalactites, although certain details of their formation differ. \u0026nbsp;We built a laboratory icicle growing machine to explore icicle physics. We learned what it takes to make a platonic icicle and the surprising origin of the ripples.\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"\u003Ch2 class=\u0022mainTitle\u0022\u003EConsider the Icicle\u003C\/h2\u003E","format":"limited_html"}],"field_summary_sentence":[{"value":"Consider the Icicle"}],"uid":"27664","created_gmt":"2013-01-30 12:47:41","changed_gmt":"2016-10-08 02:02:19","author":"Alison Morain","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2013-02-04T14:00:00-05:00","event_time_end":"2013-02-04T15:00:00-05:00","event_time_end_last":"2013-02-04T15:00:00-05:00","gmt_time_start":"2013-02-04 19:00:00","gmt_time_end":"2013-02-04 20:00:00","gmt_time_end_last":"2013-02-04 20:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"126011","name":"School of Physics"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cp\u003E\u003Ca href=\u0022mailto:alison.morain@physics.gatech.edu\u0022\u003Ealison.morain@physics.gatech.edu\u003C\/a\u003E\u003C\/p\u003E","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}}}