Abstract
A 3D Reynolds Averaged Navier Stokes (RANS) model of a meandering channel with rectangular cross-section has been developed using the commercial software package FLUENT 6.2. This model solves the 3D Navier-Stokes equations using the PISO scheme for the pressure-velocity coupling and the realizable k-?̊ model for turbulence closure. Output of the numerical model is compared to validation experiments conducted in a physical model, which represents two wavelengths of a regime channel and allows for the measurement of flow patterns at several discharges and variable bed forms. The computed water depths and velocity profiles of the CFD model output are in good agreement with the physical model results. The simulations slightly underpredict the streamwise velocities, which reach a maximum just before the apex of the meander bend, at the inner bank in the lower part of the flow depth. The CFD model also captures the motion of the secondary current or transverse flow well, showing the same direction of current along the entire second wavelength.
| Original language | English (US) |
|---|---|
| Title of host publication | WIT Transactions on Engineering Sciences |
| Pages | 55-64 |
| Number of pages | 10 |
| Volume | 59 |
| DOIs | |
| State | Published - 2008 |
| Externally published | Yes |
| Event | 7th International Conference on Advances in Fluid Mechanics, AFM'08 - The New Forest, United Kingdom Duration: May 21 2008 → May 23 2008 |
Other
| Other | 7th International Conference on Advances in Fluid Mechanics, AFM'08 |
|---|---|
| Country | United Kingdom |
| City | The New Forest |
| Period | 5/21/08 → 5/23/08 |
Fingerprint
Keywords
- CFD
- Experimental results
- Meandering rivers
- Numerical model
- Open channel flow
ASJC Scopus subject areas
- Electrical and Electronic Engineering
- Mechanical Engineering
- Mechanics of Materials
- Materials Science(all)
- Mathematics(all)
Cite this
Validation of a CFD model for flow in meandering rivers using an experimental test-setup : First results. / Delecluyse, K.; Brantegem, W.; Troch, Peter A; Verhoeven, R.; Vierendeels, J.
WIT Transactions on Engineering Sciences. Vol. 59 2008. p. 55-64.Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
}
TY - GEN
T1 - Validation of a CFD model for flow in meandering rivers using an experimental test-setup
T2 - First results
AU - Delecluyse, K.
AU - Brantegem, W.
AU - Troch, Peter A
AU - Verhoeven, R.
AU - Vierendeels, J.
PY - 2008
Y1 - 2008
N2 - A 3D Reynolds Averaged Navier Stokes (RANS) model of a meandering channel with rectangular cross-section has been developed using the commercial software package FLUENT 6.2. This model solves the 3D Navier-Stokes equations using the PISO scheme for the pressure-velocity coupling and the realizable k-?̊ model for turbulence closure. Output of the numerical model is compared to validation experiments conducted in a physical model, which represents two wavelengths of a regime channel and allows for the measurement of flow patterns at several discharges and variable bed forms. The computed water depths and velocity profiles of the CFD model output are in good agreement with the physical model results. The simulations slightly underpredict the streamwise velocities, which reach a maximum just before the apex of the meander bend, at the inner bank in the lower part of the flow depth. The CFD model also captures the motion of the secondary current or transverse flow well, showing the same direction of current along the entire second wavelength.
AB - A 3D Reynolds Averaged Navier Stokes (RANS) model of a meandering channel with rectangular cross-section has been developed using the commercial software package FLUENT 6.2. This model solves the 3D Navier-Stokes equations using the PISO scheme for the pressure-velocity coupling and the realizable k-?̊ model for turbulence closure. Output of the numerical model is compared to validation experiments conducted in a physical model, which represents two wavelengths of a regime channel and allows for the measurement of flow patterns at several discharges and variable bed forms. The computed water depths and velocity profiles of the CFD model output are in good agreement with the physical model results. The simulations slightly underpredict the streamwise velocities, which reach a maximum just before the apex of the meander bend, at the inner bank in the lower part of the flow depth. The CFD model also captures the motion of the secondary current or transverse flow well, showing the same direction of current along the entire second wavelength.
KW - CFD
KW - Experimental results
KW - Meandering rivers
KW - Numerical model
KW - Open channel flow
UR - http://www.scopus.com/inward/record.url?scp=58749087716&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=58749087716&partnerID=8YFLogxK
U2 - 10.2495/AFM080061
DO - 10.2495/AFM080061
M3 - Conference contribution
SN - 9781845641092
VL - 59
SP - 55
EP - 64
BT - WIT Transactions on Engineering Sciences
ER -