Bekele, Mulugeta (PhD)Hailu, Demmelash2018-06-202023-11-092018-06-202023-11-092006-06http://10.90.10.223:4000/handle/123456789/2349A microscopic heat engine is modeled as a Brownian particle which moves through a highly viscous medium, in an alternately placed hot and cold heat baths, in a periodic asymmetric saw-tooth potential. Expressions for unidirectional probability current density (due to thermal variation) as well as energetics of the engine are found in terms of parameters of the engine for two cases: in the presence and absence of static external force. Power output and efficiency at maximum power and maximum efficiency regimes are studied numerically for both casesenMicroscopic Heat EngineThesis