scholarly journals THB INFLUENCE OF WAVES OH CURRENT PROFILES

1986 ◽  
Vol 1 (20) ◽  
pp. 7 ◽  
Author(s):  
Felicity C. Coffey ◽  
Peter Nielsen
Keyword(s):  
Boundary Layer ◽  
Friction Velocity ◽  
Dimensionless Parameter ◽  
Velocity Amplitude ◽  
Steady Current ◽  
Vertical Scale ◽  
Flow Components ◽  
Current Reduction ◽  
Wave Boundary ◽  
The Waves

A simple model is presented for steady current profiles in the presence of waves. The current reduction and apparent roughness increase caused by the waves are shown to depend mainly on one dimensionless parameter u*/u"*, i.e. the ratio between the friction velocity amplitude due to the waves and the time averaged friction velocity. The model recognises the need to apply different eddy viscosities to different flow components. Also, the thickness of the wave influenced layer near the bed is comceptually separated from the vertical scale of the wave boundary layer.

scholarly journals ASPECTS OF WAVE CURRENT BOUNDARY LAYER FLOWS

1984 ◽  
Vol 1 (19) ◽  
pp. 150 ◽  
Author(s):  
Felicity C. Coffey ◽  
Peter Nielsen
Keyword(s):  
Boundary Layer ◽  
Eddy Viscosity ◽  
Friction Velocity ◽  
Field Measurements ◽  
Laboratory Measurements ◽  
Boundary Layer Flows ◽  
Steady Current ◽  
Bed Roughness ◽  
Flow Components ◽  
A Current

Field measurements of steady current profiles under the influence of waves are described, including a technique for obtaining an extra independant estimate of the friction velocity. Field and laboratory measurements are analysed for the effect on apparent bed roughness by superimposing waves on a current. Finally the applicability of the eddy viscosity concept to combined flows is examined. The conclusion is that in general, different eddy viscosities must be applied to different flow components.

scholarly journals REACH OF WAVES TO THE BED OF THE CONTINENTAL SHELF

1970 ◽  
Vol 1 (12) ◽  
pp. 40 ◽  
Author(s):  
Richard Silvester ◽  
Geoffrey R. Mogridge
Keyword(s):  
Boundary Layer ◽  
Continental Shelf ◽  
Surf Zone ◽  
Sediment Concentration ◽  
Geologic Time ◽  
Continental Shelves ◽  
Transport Velocity ◽  
Mass Transport Velocity ◽  
Wave Boundary ◽  
The Waves

The physiography of Continental Shelves and their major composition of sediment indicate strongly their terrigenous origin and their smoothing by wave action This premise is supported by the geologic time over which waves have existed and the mass-transport velocity in these relatively shallow depths, particularly the net movement within the wave boundary layer at the bed A given wave tram arriving obliquely to the shore can transport material along the coast, both beyond the breaker line and within the surf zone It is shown that for equal over-all discharge in the two zones, the average sediment concentration offshore close to the bed need be reasonably small, indicating that transport near the beach could be a fraction of that from the breakers to the reach of the waves This latter limit is shown to extend at least half way across the Shelf, with possibilities of greater reach when more realistic prototype conditions are introduced into experiments.

scholarly journals TURBULENT CURRENTS IN THE PRESENCE OF WAVES

1970 ◽  
Vol 1 (12) ◽  
pp. 141
Author(s):  
Helge Lundgren
Keyword(s):  
Boundary Layer ◽  
Wave Propagation ◽  
Velocity Profile ◽  
Current Velocity ◽  
Friction Velocity ◽  
Approximate Theory ◽  
Current Direction ◽  
Constant Depth ◽  
Wave Boundary ◽  
A Current

This paper presents an approximate theory for the reduction of the velocity of a current due to the presence of sinusoidal waves. For a given slope, S, in water of constant depth, d, the current velocity profile is U(z) = U^ (2.5'ln — - A) (1) t zo as a function of the height, z, above the bed. Eq. 1 is valid only above the thin wave boundary layer near the bed, the roughness of which is k = 30 z . Uf is the current friction velocity defined by p Ul = y d S = T (2) f ' cw CW Values of A can be found from: Fig. 2 where Aj applies when the direction of wave propagation is parallel to the current direction, and Fig. 3 where A2 applies when the direction of wave propagation is perpendicular to the current direction, cf. Notation in Sec. 2. The theory is based upon a number of assumptions (see Sec. 4).

Modeling of controlled shock-wave/boundary-layer interactions in transonic channel flow

AIAA Journal ◽  
2001 ◽  
Vol 39 ◽  
pp. 2293-2301
Author(s):  
R. Benay ◽  
P. Berthouze ◽  
R. Bur
Keyword(s):  
Boundary Layer ◽  
Shock Wave ◽  
Channel Flow ◽  
Wave Boundary Layer ◽  
Wave Boundary

Insights in turbulence modeling for crossing-shock-wave/boundary-layer interactions

AIAA Journal ◽  
2001 ◽  
Vol 39 ◽  
pp. 985-995 ◽  
Author(s):  
Frederic Thivet ◽  
Doyle D. Knight ◽  
Alexander A. Zheltovodov ◽  
Alexander I. Maksimov
Keyword(s):  
Boundary Layer ◽  
Shock Wave ◽  
Turbulence Modeling ◽  
Wave Boundary Layer ◽  
Wave Boundary

Fluid-Thermal-Structural Interactions in Ramp-Induced Shock-Wave Boundary-Layer Interactions at Mach 6

2021 ◽  
Author(s):  
Antonio Giovanni Schöneich ◽  
Thomas J. Whalen ◽  
Stuart J. Laurence ◽  
Bryson T. Sullivan ◽  
Daniel J. Bodony ◽  
...  
Keyword(s):  
Boundary Layer ◽  
Shock Wave ◽  
Wave Boundary Layer ◽  
Structural Interactions ◽  
Wave Boundary
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