DIRECT NUMERICAL SIMULATION OF TURBULENT FLOW AROUND 3D STEPPED CYLINDER WITH ADAPTIVE MESH REFINEMENT

Massaro D, Peplinski A, Schlatter P (2022)

Publication Type: Conference contribution

Publication year: 2022

Publisher: International Symposium on Turbulence and Shear Flow Phenomena, TSFP

Conference Proceedings Title: 12th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2022

Event location: Osaka, Virtual, JPN

Abstract

In the present study, we investigate the turbulent three-dimensional flow around a stepped cylinder, namely two cylinders of different diameters joint at one extremity. We perform a direct numerical simulation with the spectral element code Nek5000 that uses a high order spatial discretisation (the polynomial order is p = 7). The adaptive mesh refinement technique is employed in the error-driven meshing procedure, allowing an adequately refined mesh everywhere. We consider the Reynolds number ReD = 1000, based on the large cylinder diameter and the uniform inflow velocity. We compare our results with the previous experimental campaign by Morton & Yarusevych (2014b). The results agree very well and we can identify the three main wake regions: the S, N and L cell with a Strouhal number StS = 0.408, StN = 0.188 and StL = 0.201 respectively. The instantaneous mean flow properties are studied showing that the junction dynamics is more similar to the previous laminar studies at ReD = 150 rather than at higher ReD = 3900. Moreover, proper orthogonal decomposition is used to detect the most energetic coherent structures, that resemble the three wake cells.

Authors with CRIS profile

Philipp Schlatter

Involved external institutions

Royal Institute of Technology / Kungliga Tekniska Högskolan (KTH) SE Sweden (SE)

How to cite

APA:

Massaro, D., Peplinski, A., & Schlatter, P. (2022). DIRECT NUMERICAL SIMULATION OF TURBULENT FLOW AROUND 3D STEPPED CYLINDER WITH ADAPTIVE MESH REFINEMENT. In 12th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2022. Osaka, Virtual, JPN: International Symposium on Turbulence and Shear Flow Phenomena, TSFP.

MLA:

Massaro, Daniele, Adam Peplinski, and Philipp Schlatter. "DIRECT NUMERICAL SIMULATION OF TURBULENT FLOW AROUND 3D STEPPED CYLINDER WITH ADAPTIVE MESH REFINEMENT." Proceedings of the 12th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2022, Osaka, Virtual, JPN International Symposium on Turbulence and Shear Flow Phenomena, TSFP, 2022.

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