Abstract
Continuous gravity wave radiation from unsteady rotational flow is investigated numerically in f-plane shallow water system for a wide range of Rossby number, Ro, and Froude number, Fr, using forced dissipative system. For large Ro, where the effect of the earth rotation is negligible, gravity wave flux is proportional to Fr, which is consistent with the aero-acoustic sound radiation theory (the Lighthill theory). However, this power law is not valid for relatively small Ro, where the effect of the earth rotation is important. The mechanism for the breakdown of the power law is also examined using temporal spectral analyses.
| Original language | English |
|---|---|
| Pages (from-to) | 299-304 |
| Number of pages | 6 |
| Journal | Theoretical and Applied Mechanics Japan |
| Volume | 54 |
| Publication status | Published - 2005 |
| Externally published | Yes |
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ASJC Scopus subject areas
- Mechanics of Materials
Cite this
Froude number dependence of gravity wave radiation from unsteady rotational flow in f-plane shallow water system. / Sugimoto, Norihiko; Ishioka, Keiichi; Yoden, Shigeo.
In: Theoretical and Applied Mechanics Japan, Vol. 54, 2005, p. 299-304.Research output: Contribution to journal › Article
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TY - JOUR
T1 - Froude number dependence of gravity wave radiation from unsteady rotational flow in f-plane shallow water system
AU - Sugimoto, Norihiko
AU - Ishioka, Keiichi
AU - Yoden, Shigeo
PY - 2005
Y1 - 2005
N2 - Continuous gravity wave radiation from unsteady rotational flow is investigated numerically in f-plane shallow water system for a wide range of Rossby number, Ro, and Froude number, Fr, using forced dissipative system. For large Ro, where the effect of the earth rotation is negligible, gravity wave flux is proportional to Fr, which is consistent with the aero-acoustic sound radiation theory (the Lighthill theory). However, this power law is not valid for relatively small Ro, where the effect of the earth rotation is important. The mechanism for the breakdown of the power law is also examined using temporal spectral analyses.
AB - Continuous gravity wave radiation from unsteady rotational flow is investigated numerically in f-plane shallow water system for a wide range of Rossby number, Ro, and Froude number, Fr, using forced dissipative system. For large Ro, where the effect of the earth rotation is negligible, gravity wave flux is proportional to Fr, which is consistent with the aero-acoustic sound radiation theory (the Lighthill theory). However, this power law is not valid for relatively small Ro, where the effect of the earth rotation is important. The mechanism for the breakdown of the power law is also examined using temporal spectral analyses.
UR - http://www.scopus.com/inward/record.url?scp=33646712153&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=33646712153&partnerID=8YFLogxK
M3 - Article
AN - SCOPUS:33646712153
VL - 54
SP - 299
EP - 304
JO - Theoretical and Applied Mechanics
JF - Theoretical and Applied Mechanics
SN - 1348-0693
ER -