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THE VARIATIONAL PRINCIPLE REPLACING THE PRINCIPLE OF MINIMUM ENTROPY PRODUCTION FOR COUPLED NON-STATIONARY HEAT AND MASS TRANSFER PROCESSES WITH CONVECTIVE MOTION AND RELAXATION.

Author(s) : SIENIUTYCZ S.

Type of article: Article

Summary

IT IS A WELL KNOWN FACT THAT THE VARIATIONAL THEOREM OF MINIMUM ENTROPY PRODUCTION DOES NOT APPLY FOR NON-STATIONARY PROCESSES AND / OR IN THE PRESENCE OF CONVECTION. FOR SUCH PROCESSES A NEW THERMODYNAMIC FUNCTIONAL OF THE HAMILTONIAN TYPE REPLACING THE FUNCTIONAL OF ENTROPY PRODUCTION IS GIVEN IN THIS WORK. THE STATIONARITY CONDITIONS OF THIS FUNCTIONAL ARE THE HYPERBOLIC EQUATIONS OF COUPLED ENERGY AND MASS TRANSPORT WHICH TAKE INTO ACCOUNT THE EFFECTS OF NON-STATIONARITY AND MACROSCOPIC MOTION IN MECHANICAL EQUILIBRIUM. THE ENGINEERING SIGNIFICANCE OF THE VARIATIONAL PRINCIPLE GIVEN CONSISTS IN FINDING APPROXIMATE FIELDS OF TEMPERATURE AND CONCENTRATIONS WITH THE HELP OF DIRECT VARIATIONAL METHODS.

Details

  • Original title: THE VARIATIONAL PRINCIPLE REPLACING THE PRINCIPLE OF MINIMUM ENTROPY PRODUCTION FOR COUPLED NON-STATIONARY HEAT AND MASS TRANSFER PROCESSES WITH CONVECTIVE MOTION AND RELAXATION.
  • Record ID : 1981-1141
  • Languages: English
  • Source: International Journal of Heat and Mass Transfer - vol. 23 - n. 9
  • Publication date: 1980/09

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