The hydraulic jump Time-lapse cloud movie (note calm as long as eground) Topographic map Possible flows over obstacles Hydraulic jump

The hydraulic jump Time-lapse cloud movie (note calm as long as eground) Topographic map Possible flows over obstacles Hydraulic jump www.phwiki.com

The hydraulic jump Time-lapse cloud movie (note calm as long as eground) Topographic map Possible flows over obstacles Hydraulic jump

Trujillo, Laura, Features Director & Acting Fashion Editor has reference to this Academic Journal, PHwiki organized this Journal The hydraulic jump “As one watches them (clouds), they don’t seem to change, but if you look back a minute later, it is all very different.” – Richard P. Feynman Time-lapse cloud movie (note calm as long as eground)

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Topographic map Durran (1986) Possible flows over obstacles “supercritical flow” (fluid thickens, slows over obstacle) “subcritical flow” (fluid thins, accelerates over obstacle)

Hydraulic jump Flow starts subcritical, accelerates over obstacle & suddenly becomes supercritical Animation – potential temperature ARPS simulation Adiabatic run so isentropes are streamlines Note lower layer is more stable than upper layer Animation – u’

Hydraulic theory derivation Highlights of derivation h=h(x) is fluid depth b=b(x) is obstacle height Froude number Froude number dependence Fr > 1 – fluid thickens, slows on upslope (supercritical flow) Fr < 1 - fluid thins, accelerates on upslope (subcritical flow) Fr < 1 transition to Fr > 1 over crest -> hydraulic jump

Durran (1986) Durran’s “Froude number” For Fig. 3 U = 25 m/s (initial wind) NL = .025 (more stable lower layer) NU = .01 (less stable upper layer) H = 3000 m (depth of lower stable layer) Initial Froude number = 0.57 (subcritical) U Fr H Fr Durran Fig. 3 U = 25 m/s, H = 3000 m, vary mtn height Fr at crest Fr = 0.74 (Fr increased, but not by enough) Fr = 1.19 (Fr increased by enough to become supercritical) Fr at crest Fr = 0.90 (Fr increased, but not by enough) Fr = 1.27 200 m mtn 300 m mtn 500 m mtn 800 m mtn Initial Fr = 0.57

Durran Fig. 5 U = 25 m/s, 500 m mtn, vary H 1000 m H 2500 m H 3500 m H 4000 m H Fr > 1 everywhere (fluid thickens upstream in addition to thins downstream) Fr < 1 Everywhere (fluid thins upstream in addition to thickens downstream) Trujillo, Laura Arizona Republic Features Director & Acting Fashion Editor www.phwiki.com

Trujillo, Laura Features Director & Acting Fashion Editor

Trujillo, Laura is from United States and they belong to Arizona Republic and they are from  Phoenix, United States got related to this Particular Journal. and Trujillo, Laura deal with the subjects like Fashion and Wearing Apparel; Features/Lifestyle; Home Decorating; Home Furnishings/Housewares; Home Improvements and Remodeling

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