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2 2008

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Analogie równań opisujących proces termodyfuzji w ośrodku ciągłym i mikropolarnym

100%

Wieczorek B.

Roczniki Inżynierii Budowlanej

2008

tom z. 8

93--96

In the paper are presented the formulation thermodiffusion problems in viscoelastic solid with multicomponent body. There is analysed the model of the continuous medium and the micropolar medium. The balance of mass, momentum, angular momentum, energy and entropy in a solid are proposed for each of the ingredients. Next, the balance equations are obtained for the body. The physical equations of the process are obtained assuming the thermodynamic potentials. Next, the final systems of equations are obtained which describe a character of mutual reaction of heat, diffusion and stress fields.

Surface effects of coupled fields in micropolar continuous media

84%

Hoffmann T. J. , Chudzicka-Adamczak M. , Pytliński R. , Pośpiech M.

Vibrations in Physical Systems

2008

tom Vol. 23

151--156

In mechanics of continuous media, one of the sub areas is the coupled field theory describing interactions of mechanical, thermal, diffusion and electromagnetic field. All this physical fields are represented in the tensors introduced in this theory. Taking into consideration the momentum and angular momentum of the electromagnetic field in medium requires introduction of the fields: couple stress, mass angular momentum and mass couple in balance equations. From the vectorial nature of momentum, angular momentum, force and couple it appears that the stress tensor and couple stress tensor are the second order. Bearing in mind the importance for modern technology of the physical properties of the surface and surface layer of a solid, the conception of balance equations will be applied to describe the material surface interacting with an electromagnetic field.