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Numerical Heat Transfer, Part A: Applications
An International Journal of Computation and Methodology
Volume 80, 2021 - Issue 12
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Original Articles

Effect of flow patterns on frequency characteristics of turbulent flow in a T-junction

Pages 635-642 | Received 14 Jul 2021, Accepted 29 Jul 2021, Published online: 03 Sep 2021
 

Abstract

In the present study, the turbulent flows in a T-junction are investigated by using large eddy simulations at two different flow pattern conditions of wall and impinging jets. Their momentum ratios (MR) are 1.86 and 0.114 for wall jet and impinging jet, respectively. In particular, one of the main objectives is to identify the physical parameters that scale the turbulent flow in a T-junction. The dominant frequencies existing downstream region of a T-junction are reasonably scaled by using the diameter of the branch pipe and the velocity of the main pipe as the reference length and velocity. At high MR (corresponding to the wall jet) they have similar value (∼0.2) corresponding to the vortex shedding frequency reported in the literature. On the other hand, at lower MR (corresponding to the impinging jet), with increasing MR, the frequencies are decreased. As a result, they clearly show some certain trend with respect to MR.

Additional information

Funding

This study was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIP) no. 2017M2A8A4018482.

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