Abstract
The paper deals with extensive calculations of the flow pattern in a PRENFLO gasifier by using the Computational Fluid Dynamics software CFX. The numerical results have been verified by experimental investigations by using a LDA system in a test rig operating at ambient temperatures. The results indicate that the investigated geometry meets certain requirements as for example to minimize slagging within the gasifier, to cool the producer gas below the softening point of the solid matter by using a quench gas as well as to avoid the penetration of the quench into the gasification zone.