A model of vertical distribution of suspended matter in an open channel flow

Heinloo, Jaak; Toompuu, Aleksander

doi:10.1007/s10652-010-9180-1

Cited by 2 publications

(4 citation statements)

References 21 publications

(34 reference statements)

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“…The comparison showed that the derived analytical formula for C embraces two observed basic types of vertical distribution of concentration, one with a monotonic decrease of concentration gradient with distance from the bottom and the other with a gradient maximum (lutocline) located at some distance from the bottom. (The both types of vertical distribution of suspended sediments were detected also in the bottom layer of natural water body, studied in [37]).…”

Section: Vertical Distribution Of Concentration Of Suspended Sedimentmentioning

confidence: 87%

“…In [35] Equations 21 were c h concentration of the resuspended sediments observed in the Jiaojiang Estuary (China) [36] t time instants of a spring tide cycle. The comparison showed that the derived analytical formula for C embraces two observed basic types of vertical distribution of concentration, one with a monotonic decrease of concentration gradient with distance from the bottom and the other with a gradient maximum (lutocline) located at some distance from the bottom.…”

Section: Vertical Distribution Of Concentration Of Suspended Sedimentmentioning

confidence: 99%

“…The solution explains the Stokes drift effect in good agreement with data in [41], in dim ishing the angle between the flow velocity and the shear stress. To demonstrate the stratification effect Equations (37) and (38) were solved in [39] for in   constant everywhere instead of a density jump at a certain depth modeling the assumed location of thermocline in summer and winter. The calculated vertical distribution of velocity was compared in both cases with the velocity data in [42] showing a good agreement in the dominating quality.…”

Section: Vertical Structure Of the Upper Oceanmentioning

confidence: 99%

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Postclassical Turbulence Mechanics

Heinloo

2013

JMP

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This paper surveys the formalism and applications of the postclassical turbulence mechanics (PCTM) grounded on the characterization of turbulent flow field in infinitesimal surroundings of the flow field points besides the flow velocity at these points also by the curvature of the velocity fluctuation streamlines passing these points. The PCTM applies this step to found the turbulence split into the orientated and the non-orientated constituents. The split specifies the competence of the classical turbulence mechanics (CTM) to the description of the non-orientated turbulence constituent and delegates the description of the orientated turbulence constituent (in the spirit of the theory of micropolar fluids) to the equation of moment-of-momentum. The concurrent presence of the orientated (relatively large scale) and the non-orientated (relatively small scale) turbulence constituents enables to compile the CTM and the conception of L. F. Richardson and A. N. Kolmogorov about the cascading turbulence (RK conception) within a conjoint formalism. The compilation solves the classical conflict between the CTM and the RK conception, though evinces a conflict of another type characterized as paradigmatic.

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Section: Vertical Distribution Of Concentration Of Suspended Sedimentmentioning

confidence: 87%

Section: Vertical Distribution Of Concentration Of Suspended Sedimentmentioning

confidence: 99%

Section: Vertical Structure Of the Upper Oceanmentioning

confidence: 99%

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Postclassical Turbulence Mechanics

Heinloo

2013

JMP

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“…2). The applications of the RAT theory [10][11][12][13][14][15][16][17][18][19][20][21][22]35,36] have so far proven this theory to be a tool complementing the variety of tools for discussing oceanographic and other related problems. Concerning the Ekman layer it is shown that the application of the RAT theory embraces the Stokes drift and stratification effects in one single model.…”

Section: Introductionmentioning

confidence: 99%

A modification of the classical Ekman model accounting for the Stokes drift and stratification effects

Heinloo

Toompuu

2011

Environ Fluid Mech

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A modification of the classical Ekman model of oceanic wind-driven currents including the Stokes drift and stratification effects is discussed. The modification is formulated as an application of turbulence mechanics accounting for the curvature effect of velocity fluctuation streamlines. It is shown that similar to the Stokes drift effect, the presence of a density jump layer (pycnocline) decreases the veering of the flow velocity vector at the surface from the direction of the wind stress. It is shown also that in the pycnocline the decrease of the norm of the velocity vector as well as its rotation with depth is smaller than in the regions adjacent to the pycnocline. If the Stokes drift and stratification effects are neglected, the model reduces to the classical Ekman solution with the coefficient of the turbulent shear viscosity replaced by an effective viscosity coefficient. The vertical distributions of velocity predicted by the modified model are compared with the velocity data measured in the Drake Passage and within the Long-Term Upper Ocean Study (LOTUS) in the North Atlantic.

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A model of vertical distribution of suspended matter in an open channel flow

Cited by 2 publications

References 21 publications

Postclassical Turbulence Mechanics

Postclassical Turbulence Mechanics

A modification of the classical Ekman model accounting for the Stokes drift and stratification effects

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