Heat and Mass Transfer

“…It is described by the boundary-initial problem similar to (6)(7)(8)(9). Namely, in (6-7) v 2 (r, t) has to be exchanged by h (B) 2 (r, t), what is denoted by the symbol…”

Section: Fundamental Solutions and The Total Thermal Fieldmentioning

confidence: 99%

The simplified method for transient thermal field analysis in a polymeric DC cable

Gołębiowski

Zaręba

2011

Electr Eng

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The simplified method of analysis of the thermal field in the futuristic model of a DC cable is presented. The thermal conductivity of a non-conducting layer is very small comparing with the same parameter of conducting regions. The above causes very fast heat propagation in the core and coating, which in the consequences are approximated by inert elements of the first order. Spatial changes in the field in insulation cannot be neglected, because of the significantly slow heat transfer. For that reason, insulation is treated as an element of distributed parameters. The boundary-initial parabolic problem of a non-conducting region is solved by means of Duhamel's theorem. The fundamental solutions of superposition integrals are determined by the separation of variables method. The maximal deviation of results obtained by the finite element method does not exceed 7.2%. The heating curves and results of verification are presented in a graphic form.

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“…The fundamentals of radiative heat transfer are explained in detail in e.g. (Siegel & Howell, 2002), (Modest, 2003), (Baehr & Stephan, 2006) and (Welty et al, 2001). …”

Section: Modeling Radiative Heat Transfermentioning

confidence: 99%