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 language | English |
|---|---|
| Pages (from-to) | 365-381 |
| Number of pages | 17 |
| Journal | Boundary-Layer Meteorology |
| Volume | 130 |
| Issue number | 3 |
| DOIs | |
| Publication status | Published - Feb 12 2009 |
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All Science Journal Classification (ASJC) codes
- Atmospheric Science
Cite this
Wind-tunnel and numerical simulations of the coastal thermal internal boundary layer. / Hara, Tomohiro; Ohya, Yuji; Uchida, Takanori; Ohba, Ryohji.
In: Boundary-Layer Meteorology, Vol. 130, No. 3, 12.02.2009, p. 365-381.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Wind-tunnel and numerical simulations of the coastal thermal internal boundary layer
AU - Hara, Tomohiro
AU - Ohya, Yuji
AU - Uchida, Takanori
AU - Ohba, Ryohji
PY - 2009/2/12
Y1 - 2009/2/12
N2 - 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.
AB - 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.
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U2 - 10.1007/s10546-008-9343-5
DO - 10.1007/s10546-008-9343-5
M3 - Article
VL - 130
SP - 365
EP - 381
JO - Boundary-Layer Meteorology
JF - Boundary-Layer Meteorology
SN - 0006-8314
IS - 3
ER -