Details

Autor(en) / Beteiligte

• Yoon, H.S.
• Sharp, K.V.
• Hill, D.F.
• Adrian, R.J.
• Balachandar, S.
• Ha, M.Y.
• Kar, K.

Titel

Integrated experimental and computational approach to simulation of flow in a stirred tank

Ist Teil von

• Chemical engineering science, 2001-12, Vol.56 (23), p.6635-6649

Ort / Verlag

Oxford: Elsevier Ltd

Erscheinungsjahr

2001

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• The stirred tank reactor is one of the most commonly used devices in industry for achieving mixing and reaction. We consider a combined experimental/computational approach for the simulation of flow inside a stirred tank. Two sets of experiments are performed to measure the velocity field in the neighborhood of the impeller. The first set of PIV measurements is on six different r– z planes phase locked at 0°, 10°, 20°, 30°, 40° and 50° to the blade location. The second set of PIV measurements is on a curved θ– z plane whose radial location is just outside the impeller blade tip radius. Measurements indicate that the impeller-induced flow is dominated by three flow components: a circumferential flow, a tangential jet and pairs of tip vortices. A simple theoretical model is developed for each flow component and their superposition is observed to provide a good description of the impeller-induced flow. The theoretical model is used as a velocity boundary condition for numerical simulation. The impeller-induced boundary condition is fully three dimensional, an important aspect that significantly enriches the mathematical representation of the primary source of motion. The results of two- and three-dimensional simulations are compared with measurements in the interior of the tank.