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In-cylinder air motion in an internal combustion (IC) engine has a strong influence on engine combustion, performance and exhaust emissions. In spark ignition engines, large-scale in-cylinder fluid flows like swirl and tumble generated during intake stroke will be later dissipated as turbulence during compression stroke before ignition which promotes flame kernel growth and propagation rate. These types of in-cylinder flows are more desirable in stratified and direct injection spark ignition engines. In IC engines, in-cylinder flows are mainly affected by shape of combustion chamber, intake manifold orientation, compression ratio, crank angle position and engine speed.