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Arbitrary bed roughness in 3D numerical model of the spherical particle saltation
. The geometricalmeaning of the calibration coefficients and their relation with the bed roughness wereThe 3D numerical model of spherical particle saltation in channel with rough bed was described. In the model, t...
BK - Mechanika tekutin
- 2006 •
- D
Rok uplatnění
D - Stať ve sborníku
Improvement of the 3D numerical model of the spherical particle saltation
. The definition of the contact zone was extended for arbitrary value of bed roughnessRecently developed improvements of the 3D numerical model of the spherical particle saltation in the channel with rough bed<...
BK - Mechanika tekutin
- 2006 •
- D
Rok uplatnění
D - Stať ve sborníku
Flow roughness evaluation in mobile-bed streams
Recent field measurements are described of mobile-bed roughness in selected catalogue. The field results of the bed roughness in two gravel-bed streams under flash of the bed roughness of...
BK - Mechanika tekutin
- 2010 •
- Jx
Rok uplatnění
Jx - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)
Model of rough bed for numerical simulation of saltation
The present paper offers a model of rough bottom for simulation of bed load transport. In the simulation, the bed load transport or sand motion happens in the open or close conduits with averaged turbulent flow. In the mode...
BK - Mechanika tekutin
- 2015 •
- Jx •
- Link
Rok uplatnění
Jx - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)
Výsledek na webu
Bed roughness at high bed shear in open channels and pressurized pipes
The roughness is discussed of gravel bed streams at high bed shear caused were carried out in two gravel-bed streams after a disastrous flood in June 2009. The measurements indicated that at the peak discharges the...
BK - Mechanika tekutin
- 2010 •
- D
Rok uplatnění
D - Stať ve sborníku
2D numerical simulation of non-spherical particle collision with rough bed
The paper deals with a theoretical analysis of a collision of saltating solid particles of ellipsoid shape with a rough bed. Form known values of translational and rotational velocity of the particle and initial position before a co...
BK - Mechanika tekutin
- 2005 •
- D
Rok uplatnění
D - Stať ve sborníku
Dependence of saltation parameters on bed roughness and bed porosity
particle. A new formula was proposed for bed roughness based on size and standardIn numerical models of bed load transport a bed structure of channel could be described by two parameters, a size of bed pa...
BK - Mechanika tekutin
- 2012 •
- D
Rok uplatnění
D - Stať ve sborníku
Numerical model of saltation in open channel with rough bed
The present contribution deals with a numerical modelling of a saltation of solid spherical particle in turbulent flow along rough bed in the open channel parameters (which can be characterized e.g. by shear velocity and water depth...
BK - Mechanika tekutin
- 2012 •
- D
Rok uplatnění
D - Stať ve sborníku
3D numerical model of particle-bed collision in particle-laden flow in channels with rough bed
spherical particle-bed impact and rebound for saltation movement of a particle in channels with rough bed. The collision height and the contact point are defined as random variables of the collision process. The collision ...
BK - Mechanika tekutin
- 2004 •
- D
Rok uplatnění
D - Stať ve sborníku
3D numerical model of an ellipsoidal particle collision with a rough bed
The paper deals with 3D numerical model of an ellipsoidal particle collision with rough bed. The dependences of values of the particle translational and angular velocities immediately after the collision on the values immediately be...
BK - Mechanika tekutin
- 2008 •
- D
Rok uplatnění
D - Stať ve sborníku
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