for an Invited Paper for the MAR10 Meeting of The American Physical Society Fundamental deformation processes controlling nanoscale friction and wear BERND GOTSMANN, IBM Research Zurich Thermally activated processes are often responsible for the kinetics of deformation and can control tribological performance. In this contribution two such processes are discussed in combination with nanoscale t...

Penstock, a closed conduit, is an important component of hydropower projects. Various optimum design of penstock. These methods are either based on friction loss in the penstock. These formulae formulae available for penstock design have been compared the optimum design of penstock based on minimizing developed method, diameter and annual cost of penstocks out and reduction in annual cost of pe...

Equations developed for packed columns may be used to predict the overall heat transfer coefficient and friction loss in massecuite reheaters. The results seem to indicate that exchangers with the tubes staggered give higher heat transfer rates than those with the tubes in line.

The field of tribology defined in Webster’s Dictionary as “a science that deals with the design, friction, wear and lubrication of interacting surfaces in relative motion” has a long and important history in science and technology[1]. The ancient Egyptians, for example, used water to lubricate the path of sleds employed to transport extremely heavy objects. The first scientific studies of frict...

The field of tribology defined in Webster’s Dictionary as “a science that deals with the design, friction, wear and lubrication of interacting surfaces in relative motion” has a long and important history in science and technology[1]. The ancient Egyptians, for example, used water to lubricate the path of sleds employed to transport extremely heavy objects. The first scientific studies of frict...