Counterintuitive Convection Flux Confined in a U-Shaped Tube

• Fernando F Dall Agnol ^[2] ; Rodrigo A. Antunes ^[2] ; Marcio R. Loos ^[2] ; Daniel den Engelsen ^[1]
  1. [1] Brunel University London

     Brunel University London

     Hillingdon, Reino Unido

     
  2. [2] Federal University of Santa Catarina
• Localización: The Physics Teacher, ISSN 0031-921X, Vol. 57, Nº. 3, 2019, págs. 184-185
• Idioma: inglés
• Texto completo no disponible (Saber más ...)
• Resumen

  • Heating a fluid causes a local expansion and the resulting buoyance of the rarefied fluid drives it upward. This phenomenon roughly defines heat convection. Convection is fairly well known due to our familiarity with a large number of convection systems in open air like candles, bonfires, barbecue grills, boiling pans, hot air balloons, etc. Most heat sources generate convection that can be seen or felt. Therefore, our common sense may trick us to conclude that heat sources will always drive fluids straight up. However, this is not always the case when the fluid is confined, as we will show.