|
| |
|
|
Initial velocities of free-settling spherical particle
Chára, Zdeněk ; Kysela, Bohuš
The paper deals with experimental research of the initial phase of free-settling spherical particle which density is close to the density of water. The experiments were carried out with a smooth particle as well as with a particle with a rough surface. The obtained results show that in the initial phase of sedimentation, there is a formation of vortex structures, which are reflected in the increase of resistance in coefficient values.
|
|
| |
|
|
Free surface flow in a swirl separator
Chára, Zdeněk ; Kysela, Bohuš
The paper is focused on the numerical solution of the flow in a separator of the swirl geometry with the free water level. Together with the numerical simulations results of the first experimental series are shown, too. Measured shapes of the free surface levels are compared with the numerical simulations in a dependency of different conditions of discharge inlets and outlets. ANSYS Fluent 6.3 was used for the numerical simulations and ANSYS Gambit 2.4 was used for the mesh design.
|
|
|
Srovnávací studie měřících technik ADV a LDA
Chára, Zdeněk ; Matoušek, V.
The contribution compares measurements of local velocities for water flows of different configurations carried out with the help of the ADV (Acoustic Doppler Velocimeter) and LDA (Laser Doppler Anemometry) measuring techniques. Three different geometrical configurations were tested – open channel flow, flow behind a rectangular cylinder and flow behind a hole in a plate.
|
|
| |
|
| |
guest ::
