Wind-tunnel and numerical simulations of the coastal thermal internal boundary layer

Tomohiro Hara, Yuji Ohya, Takanori Uchida, Ryohji Ohba

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

Wind-tunnel experiments in a thermally stratified wind tunnel and direct numerical simulations were performed to simulate the thermal internal boundary layer (TIBL) that developed over a coastal area in a sea-breeze flow. The results of the simulations were analyzed to investigate turbulence structure in the TIBL. To study the effects of the atmospheric stability over the sea on the TIBL, two vertical profiles of temperature were created in the upstream portion of the wind-tunnel experiment and the direct numerical simulation. Turbulence statistics of the TIBL changed significantly according to the temperature profile over the sea, indicating that the stability of the flow over the sea has a significant effect on the structure and turbulence characteristics of the TIBL. Furthermore, the TIBL heights were estimated from the vertical profiles of the local Richardson number. The estimated TIBL heights agreed with those predicted by a pre-existing relation, suggesting that both the wind-tunnel experiment and the direct numerical simulation accurately reproduced the growth of the TIBL.

Original languageEnglish
Pages (from-to)365-381
Number of pages17
JournalBoundary-Layer Meteorology
Volume130
Issue number3
DOIs
Publication statusPublished - Feb 12 2009

All Science Journal Classification (ASJC) codes

  • Atmospheric Science

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