2016
DOI: 10.1007/978-3-319-33310-6_2
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Mixing and Diffusion in Regular/Fractal Grid Turbulence

Abstract: Scalar mixing in turbulent flows is widely observed in nature as well as in industrial plants. In this chapter, we deal with three topics related to mixing and diffusion in grid-generated turbulence. The first topic (shown in Sect. 1) is experimental research on an axisymmetric CO 2 jet issuing into free-stream turbulent flows generated by a square-mesh biplane round-rod grid (referred to as a regular grid in Sect. 1) and a square fractal grid. The CO 2 jet issues from a small pipe located in the decaying regi… Show more

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Cited by 7 publications
(9 citation statements)
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“…It appears very clearly that the longitudinal integral scale L x increases with the distance downstream of the grid for the two types of grids. On the other hand, L x increases with increasing U ∞ , which is consistent with previous results of [3,9]. On the other hand, L x is greater for the turbulence generated by the FSG than for the turbulence generated by the SFSG.…”
Section: Resultssupporting
confidence: 91%
See 1 more Smart Citation
“…It appears very clearly that the longitudinal integral scale L x increases with the distance downstream of the grid for the two types of grids. On the other hand, L x increases with increasing U ∞ , which is consistent with previous results of [3,9]. On the other hand, L x is greater for the turbulence generated by the FSG than for the turbulence generated by the SFSG.…”
Section: Resultssupporting
confidence: 91%
“…The longitudinal Taylor scale λ decreases with the distance downstream of the two types of grids for U ∞ = 1.5m/s and U ∞ = 2.5m/s. However, λ increases with the distance downstream of the two types of grids for U ∞ = 5m/s, which is consistent with previous results [3,9].…”
Section: Discussionsupporting
confidence: 92%
“…Turbulence in a free circular jet was investigated by [13] to study the necessary conditions for self-preservation of free turbulent flow with a virtual excitation source. Jet technique applications related to mixing and diffusion in grid-generated turbulence are given in extensive study [14]. Interesting results on turbulence behaviour in a free jet were obtained using direct calculations of three-dimensional NavierStokes equations.…”
Section: Main Bodymentioning
confidence: 99%
“…Several modern developments, which apply the latest technical methods of research and theoretical concepts, can be useful for the search for a new idea of jet preservation. Extensive publication [6] considers a number of such methods. In particular, it considers positions of the jet technique that relate to mixing and diffusion in a turbulent flow created by lattices.…”
Section: Literature Review and Problem Statementmentioning
confidence: 99%