IJE TRANSACTIONS C: Aspects Vol. 35 No. 12, (December 2022) 2395-2402 Please cite this article as: S. Vivekananda Sharma, G. Hemalatha, Numerical and Experimental Investigation on Small Scale MR damper, International Journal of Engineering, Transactions C: Aspects, Vol. 35, No. 12, (2022), 2395-2402 International Journal of Engineering Journal Homepage: www.ije.ir Numerical and Experimental Investigation on Small Scale Magnetorheological Damper S. Vivekananda Sharma*, G. Hemalatha Department of Civil Engineering, Karunya institute of technology and Sciences, Coimbatore, India PAPER INFO Paper history: Received 24 August 2022 Received in revised form 22 September 2022 Accepted 23 September 2022 Keywords: COMSOL Finite Element Method Excitation Frequency Servo-Hydraulic UTM Material Testing Machine Suite Damping Force Vibration Control Civil Application ABSTRACT This paper presents the design of an Magnetorheological (MR) damper that includes an arrangement of a piston and cylinder. This study developed a 3-D model based on the finite element method (FEM) concept on the COMSOL Multiphysics to analyze and investigate the MR damper characteristics. A prototype of the MR damper is being fabricated based on the FEM model and is put through a series of experiments using the Servo-Hydraulic material testing machine (MTS). Maximum and minimum forces, 171.5235N and 249.2749N, were measured at 0.1Hz and 1Hz, respectively, for the FEM model. The fabricated model obtained similar results at 0.1Hz and 1Hz, with maximum and minimum forces of 175.9103N and 252.7765N, respectively. Comparing these two model analyses reveals that the FEM- based model accurately depicts the experimental behaviour of the MR damper in terms of its damping force, although there is minor variation. The findings of this paper will be helpful for designers in creating MR dampers that are more efficient and reliable, as well as in predicting the characteristics of their damping force. doi: 10.5829/ije.2022.35.12c.16 NOMENCLATURE   Yield stress force(N)  volumetric flow rate (mm 3 /s)   Viscous Component force(N)   C/s of piston area (mm 2)   Friction Component force(N) D Diameter of cylinder (mm)   Total damping force(N)   Diameter of piston Rod (mm) v velocity of the piston (mm/s 2 ) h Height of piston (mm) Lt Length of Piston rod (mm) Greek Symbols   Shear stress(kPa))  circumference of the flow path  Viscosity of MR fluid () reciprocating motion  Magnetic Field density (T) 1. INTRODUCTION 1 Engineers and researchers aim to learn vibration control technology since civil infrastructure, automotive systems, and industrial equipment vibrate excessively. Magnetorheological dampers,as a method of vibration control technology are used to stop excessive vibrations. It's an improved version of hydraulic damper. Magnetorheological fluid has been replaced with damper oil (MR fluid). This MR fluid contains carrier liquid and freely movable magnetic particles. MR fluid operates like *Corresponding Author Institutional Email: svivekananda@karunya.edu.in (S. Vivekananda Sharma) damper oil without magnetic fields. Iron particles in a magnetic field generate a chain pattern. This structure dampens extrinsic vibrations in the electromagnetic field created by an electromagnet on the damper piston. Electromagnets have many copper coils and electrifying the coils creates an electromagnetic field. Shaking buildings use MR dampers as a semi-active control system. The MR damper was popular with researchers because it is controllable and used little electricity. This allowed it to reduce the vibrations in buildings. Magnetorheology is based on how a magnetic field