Thermomechanical Effects

  • Wilhelm Brenig


Irreversible equations with more than one variable contain off-diagonal terms describing couplings between diagonal effects (cross effects). In this chapter we are going to consider a system with two variables: the particle number and energy of a subsystem of a larger system. The diagonal processes are the flow of particles driven by a pressure difference between the subsystem and the rest, and a flow of heat driven by a temperature difference. The cross processes are obtained when in the foregoing sentence the words pressure and temperature are exchanged.


Pressure Difference Particle Flow Cross Effect Superfluid Component Thermomechanical Effect 
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  1. 19.1
    Becker, R.: Theorie der Wärme, Heidelberger Taschenbücher, Vol. 10 (Springer, Berlin, Heidelberg 1955) Chap. 7Google Scholar
  2. 19.2
    Tisza, L.: J. Phys. Radium 8, 1, 165, 350 (1940) Landau, LX,.: Zh. Eksp. Teor. Fiz. 11, 592 (1941)Google Scholar
  3. 19.3
    Allen, J.F., Jones, H.: Nature 141, 243 (1938)ADSCrossRefGoogle Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 1989

Authors and Affiliations

  • Wilhelm Brenig
    • 1
  1. 1.Physik-DepartmentTechnische Universität MünchenGarchingFed. Rep. of Germany

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