Dissipation effects in mechanics and thermodynamics
arXiv:1606.00346 · doi:10.1088/0143-0807/37/4/045101
Abstract
With the discussion of three examples, we aim at clarifying the concept of energy transfer associated with dissipation in mechanics and in thermodynamics. The dissipation effects due to dissipative forces, such as the friction force between solids or the drag force in motions in fluids, lead to an internal energy increase of the system and/or to a heat transfer to the surrounding. This heat flow is consistent with the second law, which states that the entropy of the universe should increase when those forces are present because of the irreversibility always associated with their actions. As far as mechanics is concerned the effects of the dissipative forces are include in the Newton's equations as impulses and pseudo-works.
18 pages, 3 figures
References in corpus (7)
- Forces on wheels and fuel consumption in cars
- From mechanics to thermodynamics -- analysis of selected examples
- Relativistic mechanical-thermodynamical formalism -- description of inelastic collisions
- The physics of a walking robot
- Thermodynamics in rotating systems -- analysis of selected examples
- Classical Analytical Mechanics and Entropy Production
- Thermodynamical asymmetries in whirling, jumping and walking