# 3D MATHEMATICAL MODEL CHARACTERIZING THE DYNAMICS OF THE TEMPERATURE FIELD OF A WALL STRUCTURE WITH A DOUBLE-SIDED FACING FROM A SAPROPEL-HEMP COMPOSITE MATERIAL

## DOI:

https://doi.org/10.17770/etr2021vol3.6648## Keywords:

Composite sapropel-hemp slab, temperature field, mathematical model## Abstract

*In this paper, a 3D mathematical model is proposed to determine the dynamics of the temperature field in a three-layer composite sapropel-hemp slab. The proposed model consists of a system of three initial-boundary value problems with respect to the temperature function for each layer, respectively, and one initial-boundary value problem with respect to the unknown velocity of heat propagation along the thickness dimension of the composite sapropel-hemp slab.*

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*ETR*, vol. 3, pp. 95–103, Jun. 2021, doi: 10.17770/etr2021vol3.6648.