Literaturnachweis - Detailanzeige
| Autor/inn/en | Ida, K.; Yoshinuma, M.; Nagaoka, K. |
|---|---|
| Titel | Increasing rate of water temperature due to an Ekman layer flow in a heated pot.fluid dynamics in the kitchen. |
| Quelle | In: American journal of physics, 73 (2005) 7, S. 635-638
PDF als Volltext |
| Sprache | englisch |
| Dokumenttyp | online; gedruckt; Zeitschriftenaufsatz |
| ISSN | 0002-9505; 1943-2909 |
| DOI | 10.1119/1.1900098 |
| Schlagwörter | Alltagsphysik; Physik; Reibung; Strömungsphysik; Viskosität; Meteorologie |
| Abstract | A sharp increase in the local temperature of heated water at the center of an aluminum pot is demonstrated a few tens of second after rotating the heated water with a spoon. The stirring leads to a sharp gradient of the temperature in the heated water, which contradicts the general belief that stirring causes a uniform temperature distribution. This sharp increase of temperature is due to the flow of an Ekman layer near the heated bottom of the pot. When this flow is prevented by a barrier at the bottom of the pot, there is no sharp increase of the water temperature. The experiments using an aluminum pot in the kitchen aid in understanding the existence and importance of flow in an Ekman layer, which is a crucial concept in hydrodynamics. © 2005 American Association of Physics Teachers. |
| Erfasst von | Arbeitsgruppe Didaktik der Physik, Universität Osnabrück |
| Update | 2005/3 |
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