Groups for Interactive Processes

When a process is produced under the divergent or convergent action of two different forces, the ratio between them represents a dimensionless number. The heat and mass transfer enhanced by the supplementary action of a pulsating field (vibration of apparatus, pulsation of one (or two) phase flow(s), ultrasound action etc.) has been experimented and applied in some cases [6.25-6.27]. Then, the new 

In the case of a high-rate heat- and mass-transfer process, heat and mass flows are not described by the classical Onsager equations (as, for instance, in Eq. (3.12))  

Equation (6.173) is valid only for one-dimensional problems. For a multidimensional study, it can be used as an approximation where the relaxation period of the thermal stress is defined as one experimental constant. A similar relationship 

When we particularize this relationship for the mass transport of the humidity into a porous medium (w = 0, because there is no microscopic displacement), we can observe the superposition of the thermo-diffusion and of the diffusive filtration (where p is the humidity flowing by filtration) over the pure diffusion process  

Based on Eq. (6.176), we obtain the next particularization for the general conservation relationship (see, for instance, Eq. (3.6)), which was established in Chapter 3  

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