Author(s): M. D’Andrea; R. E. Baddour
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Keywords: No Keywords
Abstract: Result of an ongoing investigation of sur face thermal plume turbulence is presented. The presentation. includes the analysis of infra- red scan photographs and tempera ture fluctuatlon measurements. The discharge densimetric Froude number of the plumes varied between 2.7 and 7.7 The study has revealed two dlstinct tur bulent sub- domains in a surface plume。 The inner and outer sub- -domains are referred to as tur bulent entrainment zone and intermediate turbulent zone respectively. The turbulence in the ent rainment zone ls responsible for the entr al oment and engulfment of ambient fluld into the plume. The turbulence in the intermediate zone has a different character; lt is incapable of entraining ambient fluld lnto the plume and it 1s decaying less rapldly than the turbulence in the entrainment zone. Temperature reduction observed in the inter- medlate turbulent zone is attributed to an internal mlxing process wlthin he plume itself, l. e. a turbulent mlxing process that is not accompanied by entralnment.
Year: 1985