Body, state and constitutive behaviour
Fundamental laws and constitutive equations 1. Fundamental laws: 1st, 2nd and 3rd laws of thermodynamics Mass conservation Conservation of linear momentum Conservation of angular momentum Fundamental...
View ArticleEnergy , Work and Heating
Fundamental concepts: energy and heating ENERGY AND HEATING is endowed with an amount of energy, Ut, which is a function of state (no claim is made that Ut is the total energy of the body!)....
View Article1st and 2nd principles of thermodynamics. Integral and local forms. The...
1st law of thermodynamics THE 1st LAW OF THERMODYNAMICS INTEGRAL FORMS OF 1st LAW We introduce here the following postulate of conservation of energy: the net rate at which energy flows into a body...
View ArticleState and equilibrium. Part 3
2nd law and 'External'Systems Although the 2nd law is an inequality, when it is coupled with proper constitutive equations, can be used to deduce important equations, and not merely inequalities. In...
View ArticleState and equilibrium. Part 1
State and Site We need now to assign a better defined mathematical structure to the concept of STATE. In the following we will assume that the principle of local action holds true. As a consequence all...
View ArticleState and equilibrium. Part 2
Constitutive equation for Newtonian fluids Generalized Newtonian Fluid On the basis of the 'frame indifference theorem' and of the application of the 'theorem of tensor representation' it can be...
View ArticleState and equilibrium. Part 4
2nd law and 'Internal' Systems 2nd LAW AND INTERNAL SYSTEMS SYSTEM WITH INTERNAL STATE VARIABLES (e.g. CHEMICAL REACTION, RELAXING SYSTEMS, PHASE TRANSITION) The irreversibility we have encountered in...
View ArticleMulticomponent Systems. Part 1
Multicomponent Uniform Systems We analyze now multicomponent systems and, for the sake of simplicity, we consider here uniform multicomponent systems. In such a case, the local state and the total...
View ArticleHomogeneous Reactions
Homogeneous Reactions Consider the reaction occurring in the gas phase: We can express the reaction in mathematical terms in the following way: where Bj represent the chemical species, i.e., in the...
View ArticleState and equilibrium. Part 5
Baric Derivatives BARIC DERIVATIVES Still referring to systems for which , we introduce other two state functions which are also additive functions of mass, i.e.: Reminding that, for the state we are...
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