Detached Eddy Simulation

of the generation of tumbling flow


M. Mahdaoui1*, A. Ait Msaad1,  M. Mouqallid1, E. Affad2

1 Laboratory of Mechanics, Energetics and Processes, Ecole Nationale Supérieure d’Arts et Métiers, Moulay Ismail University,

B.P. 4024 Béni M'hamed - Meknès

2Laboratory of heat and mass transfer, FST of Mohammedia, Hassan II University, B.P. 146 Yasmina Mohammedia 20800

* Corresponding author. E-mail:

Received: 16 June 2011; revised version accepted: 23 November 2011


    The call for environmentally compatible and economical vehicles, still satisfying demands for high performance, necessitates immense efforts to develop innovative engine concepts. This study proposes to have a better understanding of engine flow using a Detached Eddy Simulation (DES) SST model, which is a hybrid RANS/LES model. These simulations have been performed with the FLUENT code. To explore the suitability of the 3D DES STT to simulate the internal flow, the calculation is performed for a model tumbling flow at constant volume. This flow has been measured in an experimental set up and measurements are used to initiate and to validate calculations. The case considered is a geometrically simplified engine. In this study, non-reacting DES is undertaken with a single cycle (SC) strategy for the generation tumbling motion.


Keywords: Detached Eddy Simulation; Tumble; Cycle to cycle variations; Aerodynamics; Single cycle (SC).

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