Numerical investigations of a free turbulent jet after a 90° pipe bend
(English)Manuscript (preprint) (Other academic)
In this study the ow out of pipe after a 90pipe bend has been investigated byperforming Large Eddy Simulations. Comparisons of velocity proles, ow eldsand power spectral densities have been performed between numerical simulationsand experiments. Pipe bends exists in many industrial applications especiallyin the internal combustion engine. Performing accurate and predictive pipe owsimulations is becoming more important when more of the development work isbeing performed by simulations. The long term goal of this project is to helpwith development of simpler models that are faster to run but give the sameaccuracy. During this study it was found that the method used works well bothin predicting mean values and in resolving dynamic motions such as vortexswitching. LES calculations without a SGS model has been proven to work wellwith ows of this type as long as the grid resolution is suciently ne.
Fluid Mechanics and Acoustics
IdentifiersURN: urn:nbn:se:kth:diva-123085OAI: oai:DiVA.org:kth-123085DiVA: diva2:624484
QS 20132013-05-312013-05-312013-06-03Bibliographically approved