Consider laminar, fully developed flow in a channel of constant surface temperature t for a given mass flow rate and channel length, determine which rectangular channel, b/a - 1.0,1.43, or 2.0, will provide the highest heat transfer rate. is this heat transfer rate greater than, equal to, or less than the heat transfer rate associated with a circular tube?

An ideal otto cycle with air as the working fluid has a compression ratio of 8. the minimum and maximum temperatures in the cycle are 300 k and 1340 k. use constant specific heats at room temperature to determine (a) the amount of heat transferred to the air during the heat- addition kj/kg, (b) the thermal efficiency, and (c) the thermal efficiency of a carnot cycle ope limits. process, in rating between the same temperature