Abstract
We experimentally studied development and statistical properties of the free convective layer under a water surface. Cooling the gas-liquid interface by water evaporation generated the convective layer. Velocity and temperature fluctuations were simultaneously measured by a laser-Doppler velocimeter and a fine thermocouple. Variances and correlations for the fluctuations were normalized by the heat flux and the thickness of the convective layer, and vertical profiles of those quantities were obtained. Their profiles were compared with those in convection over a solid wall. They had striking differences near the surface, and showed almost the same behavior in the remaining convective layer. From the profile of kurutosis, the velocity fluctuation was expected to become a Gaussin distribution in a region from near the surface to the midst of the convective layer. On the other hand, the distribution of the temperature fluctuation had two peaks near the surface, and wasn't Gaussin in entire convective layer.
| Original language | English |
|---|---|
| Pages (from-to) | 616-620 |
| Number of pages | 5 |
| Journal | JSME International Journal, Series B: Fluids and Thermal Engineering |
| Volume | 49 |
| Issue number | 3 |
| DOIs | |
| Publication status | Published - Dec 1 2006 |
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All Science Journal Classification (ASJC) codes
- Mechanical Engineering
- Physical and Theoretical Chemistry
- Fluid Flow and Transfer Processes
Cite this
Evolution and structure of the free convective layer developing under a water surface. / Karasudani, Takashi; Ueda, Hiromasa; Ohya, Yuji.
In: JSME International Journal, Series B: Fluids and Thermal Engineering, Vol. 49, No. 3, 01.12.2006, p. 616-620.Research output: Contribution to journal › Article
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TY - JOUR
T1 - Evolution and structure of the free convective layer developing under a water surface
AU - Karasudani, Takashi
AU - Ueda, Hiromasa
AU - Ohya, Yuji
PY - 2006/12/1
Y1 - 2006/12/1
N2 - We experimentally studied development and statistical properties of the free convective layer under a water surface. Cooling the gas-liquid interface by water evaporation generated the convective layer. Velocity and temperature fluctuations were simultaneously measured by a laser-Doppler velocimeter and a fine thermocouple. Variances and correlations for the fluctuations were normalized by the heat flux and the thickness of the convective layer, and vertical profiles of those quantities were obtained. Their profiles were compared with those in convection over a solid wall. They had striking differences near the surface, and showed almost the same behavior in the remaining convective layer. From the profile of kurutosis, the velocity fluctuation was expected to become a Gaussin distribution in a region from near the surface to the midst of the convective layer. On the other hand, the distribution of the temperature fluctuation had two peaks near the surface, and wasn't Gaussin in entire convective layer.
AB - We experimentally studied development and statistical properties of the free convective layer under a water surface. Cooling the gas-liquid interface by water evaporation generated the convective layer. Velocity and temperature fluctuations were simultaneously measured by a laser-Doppler velocimeter and a fine thermocouple. Variances and correlations for the fluctuations were normalized by the heat flux and the thickness of the convective layer, and vertical profiles of those quantities were obtained. Their profiles were compared with those in convection over a solid wall. They had striking differences near the surface, and showed almost the same behavior in the remaining convective layer. From the profile of kurutosis, the velocity fluctuation was expected to become a Gaussin distribution in a region from near the surface to the midst of the convective layer. On the other hand, the distribution of the temperature fluctuation had two peaks near the surface, and wasn't Gaussin in entire convective layer.
UR - http://www.scopus.com/inward/record.url?scp=33847287264&partnerID=8YFLogxK
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U2 - 10.1299/jsmeb.49.616
DO - 10.1299/jsmeb.49.616
M3 - Article
AN - SCOPUS:33847287264
VL - 49
SP - 616
EP - 620
JO - JSME International Journal, Series B: Fluids and Thermal Engineering
JF - JSME International Journal, Series B: Fluids and Thermal Engineering
SN - 1340-8054
IS - 3
ER -