Mathematical Modeling of Drag Coefficient Reduction in Circular Cylinder Using Two Passive Controls at Re = 1000

Chairul Imron,Basuki Widodo,Lutfi Mardianto,Triyogi Yuwono

doi:10.3390/mca23010002

Chairul Imron, Basuki Widodo + Show 2 more

Open Access

https://doi.org/10.3390/mca23010002

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Abstract

One of the many ways to reduce drag force is by adding a small object called passive control. Two passive controls will be placed in front and at the rear of the main object. The main object used is a circular cylinder, and the passive controls used are the Type-I cylinder in the front and an elliptical cylinder at the rear of the main object. The distances between the main object and the passive controls are varied. The Reynolds number used is 1000. The effective distance between the main object and the passive controls is analyzed by using the mathematical model so that the drag coefficient on the main object is compared with the simulated one.

Highlights

New technology is always developed by conducting further research on previous research done, which is expected to change the behavior of the users
A circular cylinder, elliptical cylinder or others are objects commonly used as passive controls
The drag coefficient of a circular cylinder obtained by simulation is compared with experimental results and other simulations

Summary

Introduction

New technology is always developed by conducting further research on previous research done, which is expected to change the behavior of the users. One of the aims of research on the fluid flows passing through an object is reducing drag force on the object. Some researchers used one passive control, which is placed in front of the object, two passive controls or more with various places and shapes such as a cylindrical cylinder, a Type-I cylinder, a Type-D cylinder, etc. A circular cylinder, elliptical cylinder or others are objects commonly used as passive controls. The different shapes will produce different drag coefficients. The fluid flowing through one object or more produces different drag coefficients because of the interaction between the fluid flow and the object

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