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Home»Articles»Fluid Dynamic Simulation Studies in a Four Stroke Compression Ignition Engine

Fluid Dynamic Simulation Studies in a Four Stroke Compression Ignition Engine

Author : G. Kalivarathan and V. Jaiganesh
Volume 1 No.1 January-June 2012 pp

Abstract

G. Kalivarathan 1 and V. Jaiganesh 2
1 Research Scholar, CMJ University, Shillong, Meghalaya – 793 003, India.
2 Department of Mechanical Engineering, S.A. Enggineering College, Chennai – 600 077, Tamil Nadu, India.
E-mail: [email protected]
(Received on 07 December 2011 and accepted on 15 January 2012)Abstract

Fluid Dynamic based models are always referred to “Multidimensional models”, due to their ability to provide complete geometric information on the flow field, based on the solution of the governing equations. It is well known that over the last one decade, computers were extensively used for simulation in modeling purposes and building powerful, integrated-database systems. In general, computer based simulations have been built by the theoretical foundations and it is used in a wide range of applications. Engine flow simulation normally represents turbulence to predict various types of motions of turbulence like swirl, squish, tumble and eddies. Basically turbulent flow deals with the lateral and longitudinal motion, which is due to eddy motion. Eddy is a large group of fluid particles, which moves laterally, and longitudinally in the flow field. During this type of motion, it can change its shape or stretch and rotate or breaks into two or more eddies. Eddies are generally generated in the region of high shear in the mean flow field, near the boundary in a pipe or channel flow or in the vicinity of interface between two streams flowing at different velocities and parallel to one another. The size of large eddy will be the size of flow basically or the diameter of the pipe in which flow is analyzed. The eddies of different sizes are embedded in each other and it is impermanent in nature. The larger the eddied, which are continuously formed are breaks into smaller and smaller eddies, until they are dissipated through viscous shear finally. Large Eddy Simulation is a viable option for simulating the turbulent reacting processes that occur within the diesel environment and it has high potential to represent engines unsteadiness. LES has been developed to address the largescale unsteady phenomenon and it is assumed for engine flow simulation with promising results, since it concerns the smaller part of spectrum. Normally, it is predicted that RANS can be used for preliminary design explorations, whereas LES can be used for detailed investigations. In this paper, engine flow simulation with LES is reviewed to represent the unsteady phenomenon in a diesel engine. In recent years, since the availability of high speed computing systems, the simulation techniques have become faster, easier and more accurate also. Therefore, the systems, which were upto now, not responsive for simulation techniques, have come under the purview of simulation studies. The modeling of the engine process continuous to develop as the understanding of physic sand chemistry of the phenomenon of interest steadily expands, and as the capability of the computers to solve complex equations, continues to increase.

Keywords

Computational Fluid Dynamics, Simulation, Turbulence, Large Eddy, Combustion, Fuel Spray

Full Text:

References

Asian Review of Mechanical Engineering (ARME) is a half-yearly international peer-reviewed journal of Mechancial Engineering. One of the objectives of this journal is to disseminate knowledge on various research issues connected with the topics include, but are not limited to:

Statics and dynamics
Strength of materials and solid mechanics
Instrumentation and measurement
Thermodynamics, heat transfer, energy conversion, and HVAC
Combustion, automotive engines, fuels
Fluid mechanics and fluid dynamics
Mechanism design (including kinematics and dynamics)
Manufacturing engineering, technology, or processes
Hydraulics and pneumatics
Engineering design
Product design
Mechatronics and control theory
Material Engineering
Design engineering, Drafting, Computer-Aided Design (CAD) (including solid modeling), and Computer-Aided Manufacturing (CAM)

G. Kalivarathan 1 and V. Jaiganesh 2 1 Research Scholar, CMJ University, Shillong, Meghalaya - 793 003, India. 2 Department of Mechanical Engineering, S.A. Enggineering College, Chennai - 600 077, Tamil Nadu, India. E-mail: [email protected] (Received on 07 December 2011 and accepted on 15 January 2012)Abstract
Fluid Dynamic based models are always referred to “Multidimensional models”, due to their ability to provide complete geometric information on the flow field, based on the solution of the governing equations. It is well known that over the last one decade, computers were extensively used for simulation in modeling purposes and building powerful, integrated-database systems. In general, computer based simulations have been built by the theoretical foundations and it is used in a wide range of applications. Engine flow simulation normally represents turbulence to predict various types of motions of turbulence like swirl, squish, tumble and eddies. Basically turbulent flow deals with the lateral and longitudinal motion, which is due to eddy motion. Eddy is a large group of fluid particles, which moves laterally, and longitudinally in the flow field. During this type of motion, it can change its shape or stretch and rotate or breaks into two or more eddies. Eddies are generally generated in the region of high shear in the mean flow field, near the boundary in a pipe or channel flow or in the vicinity of interface between two streams flowing at different velocities and parallel to one another. The size of large eddy will be the size of flow basically or the diameter of the pipe in which flow is analyzed. The eddies of different sizes are embedded in each other and it is impermanent in nature. The larger the eddied, which are continuously formed are breaks into smaller and smaller eddies, until they are dissipated through viscous shear finally. Large Eddy Simulation is a viable option for simulating the turbulent reacting processes that occur within the diesel environment and it has high potential to represent engines unsteadiness. LES has been developed to address the largescale unsteady phenomenon and it is assumed for engine flow simulation with promising results, since it concerns the smaller part of spectrum. Normally, it is predicted that RANS can be used for preliminary design explorations, whereas LES can be used for detailed investigations. In this paper, engine flow simulation with LES is reviewed to represent the unsteady phenomenon in a diesel engine. In recent years, since the availability of high speed computing systems, the simulation techniques have become faster, easier and more accurate also. Therefore, the systems, which were upto now, not responsive for simulation techniques, have come under the purview of simulation studies. The modeling of the engine process continuous to develop as the understanding of physic sand chemistry of the phenomenon of interest steadily expands, and as the capability of the computers to solve complex equations, continues to increase.

Editor-in-Chief
Dr. Nukman Bin Yusoff
Department Of Mechanical Engineering, University of Malaya, Malaysia
[email protected]
Editorial Advisory Board
Prof.Kevser Dincer
Department of Mechanical Engineering, Selçuk University, Turkey
[email protected]
Dr. Kazi Md. Salim Newaz
Department of Mechanical Engineering, University of Malaya, Malaysia
[email protected]
Prof.H.P.S Abdul Khalil
School of Industrial Technology, Universiti Sains Malaysia, Malaysia
[email protected]
Dr. Ong Hwai Chyuan
Department of Mechanical Engineering, University of Malaya, Malaysia
[email protected]
Prof.Parviz Malekzadeh
Department of Mechanical Engineering, Persian Gulf University, Iran
[email protected]
Dr. Mohd Faizul Bin Mohd Sabri
Department Of Mechanical Engineering, University of Malaya, Malaysia
[email protected]
Dr. Chong Wen Tong
Department Of Mechanical Engineering, University of Malaya, Malaysia
[email protected]
Dr. Mohd Ridha Bin Muhamad
Department of Mechanical Engineering, University of Malaya, Malaysia
[email protected]
Dr. Khoo Shin Yee
Department of Mechanical Engineering, University of Malaya, Malaysia
[email protected]
Dr. Chew Bee Teng
Department of Mechanical Engineering, University of Malaya, Malaysia
[email protected]
Dr. Liew Haw Ling
Department of Mechanical Engineering, University of Malaya, Malaysia
[email protected]

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    Editorial Note

    Editorial Dr. Nukman Bin Yusoff

    Editor-in-Chief
    Dr. Nukman Bin Yusoff
    Department Of Mechanical Engineering, University of Malaya, Malaysia
    [email protected]
    Editorial Advisory Board
    Prof.Kevser Dincer
    Department of Mechanical Engineering, Selçuk University, Turkey
    [email protected]
    Dr. Kazi Md. Salim Newaz
    Department of Mechanical Engineering, University of Malaya, Malaysia
    [email protected]
    Prof.H.P.S Abdul Khalil
    School of Industrial Technology, Universiti Sains Malaysia, Malaysia
    [email protected]
    Dr. Ong Hwai Chyuan
    Department of Mechanical Engineering, University of Malaya, Malaysia
    [email protected]
    Prof.Parviz Malekzadeh
    Department of Mechanical Engineering, Persian Gulf University, Iran
    [email protected]
    Dr. Mohd Faizul Bin Mohd Sabri
    Department Of Mechanical Engineering, University of Malaya, Malaysia
    [email protected]
    Dr. Chong Wen Tong
    Department Of Mechanical Engineering, University of Malaya, Malaysia
    [email protected]
    Dr. Mohd Ridha Bin Muhamad
    Department of Mechanical Engineering, University of Malaya, Malaysia
    [email protected]
    Dr. Khoo Shin Yee
    Department of Mechanical Engineering, University of Malaya, Malaysia
    [email protected]
    Dr. Chew Bee Teng
    Department of Mechanical Engineering, University of Malaya, Malaysia
    [email protected]
    Dr. Liew Haw Ling
    Department of Mechanical Engineering, University of Malaya, Malaysia
    [email protected]

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