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Updated: Sep 2, 2025

Three-dimensional Particle Tracking Velocimetry for Turbulence Applications: Case of a Jet Flow
Published on: February 27, 2016
Evaluation of entropy driven jet symmetry transitions
Leonard F Pease1, Lenna A Mahoney2, S Thomas Yokuda2
1Pacific Northwest National Laboratory (PNNL), 902 Battelle Boulevard, MSIN K9-89, P.O. Box 999, Richland, WA, 99352, USA. fluids@pnnl.gov.
Abstract:
Here we determine whether entropy drives planar turbulent jets into round turbulent jets. Determining when a jet flow transitions from one symmetry to the next is an important but incompletely resolved problem. The constructal view argues that the transition between symmetries of jet flows is governed by the minimization or maximization of entropy. Here we explore whether entropy increases with the transition of a planar turbulent jet into a round turbulent jet and whether entropy maximization (or minimization) predicts the same location of symmetry transition as velocity matching. We find that entropy considerations presented do not predict this transition.
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