A Study on the Wake Regime Control and Drag Reduction Using Single Splitter Plate for a Flow Past a Semicircular Cylinder

S. M. Dash*, S. D. Chavda, K. B. Lua

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

In this paper, a low Reynolds number flow (Re = 100) around the semicircular cylinder of diameter D with and without splitter plate is numerically investigated using in-house developed flexible forcing IB—LBM scheme. The length of the splitter plate is systematically varied from 0.5D to 4.0D to investigate its effect on the flow structure and on the vortex-induced forces. The recirculation region behind the semicircular cylinder is increased with an increase in the length of the splitter plate, and as a consequence the base pressure is recovered, and the time-averaged drag coefficient is reduced. Complete suppression of the fluctuating lift coefficient and von Karman vortex shedding is noticed for a splitter plate of length 4.0D for which a maximum drag reduction of around 32% is found. The wake regime as a function of splitter plate length is thoroughly analysed.

Original languageEnglish
Title of host publicationAdvances in Mechanical Engineering - Select Proceedings of ICRIDME 2018
EditorsB.B. Biswal, Bikash Kumar Sarkar, P. Mahanta
PublisherSpringer
Pages97-105
Number of pages9
ISBN (Print)9789811501234
DOIs
StatePublished - 1 Jan 2020
EventInternational Conference on Recent Innovations and Developments in Mechanical Engineering, IC-RIDME 2018 - Shillong, India
Duration: 8 Nov 201810 Nov 2018

Publication series

NameLecture Notes in Mechanical Engineering
ISSN (Print)2195-4356
ISSN (Electronic)2195-4364

Conference

ConferenceInternational Conference on Recent Innovations and Developments in Mechanical Engineering, IC-RIDME 2018
CountryIndia
CityShillong
Period8/11/1810/11/18

Keywords

  • Drag reduction
  • Flow separation control
  • Semicircular cylinder
  • Single splitter plate

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