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This study analyzes the flow dynamics of a fluid within an operating torque converter. Transient computational fluid dynamics (CFD) simulations have been carried out with prescribed torque converter motions using commercially available CFD software. The analysis computes torque converter excitation forces that predict flow induced excitations during converter operation. In this study, various torque converter designs are compared and assessed with the aim of limiting flow induced excitations.

In an Internal Combustion (IC) Engine, the exhaust manifold has the primary function of channeling products of combustion from cylinder head runners to the emissions system through a collector. Exhaust manifolds must endure severe thermal loads and high strain caused by channeling extremely hot gases and fastener loads, respectively. The combination of these two loads can lead to Thermomechanical Fatigue (TMF) failures after repeated operational cycles if they are not assessed and addressed adequately during the design process. Therefore, it is vital to have a methodology in place to evaluate the life of an engine component (such as the exhaust manifold) using a TMF damage prediction model. To accomplish this, spatial temperature prediction and maximum value attained, as well as temporal distribution, are the most important input conditions.