Abstract: This paper analyzes the thermal deformations of the walls of a rectangular minichannel. The
distribution of temperature on the walls and the local coefficients of heat transfer between the heated wall and
the boiling fluid were determined on the basis of the experimental data. The thermal deformations were
examined for two vertical walls: a heated Hastelloy X plate and an unheated stainless steel plate. The heat
conduction and displacement equations were solved numerically using Ansys Workbench software. The
distributions of temperature and the thermal deformations of the walls were obtained by appropriately
combining the software modules with the mathematical description of the physical phenomena occurring in the
minichannel and introducing the boundary conditions and the experimental data. It was found that, for the
predetermined thermal conditions and the assumed thicknesses of the minichannel walls, thermal deformations
can be omitted from further analysis. However, it is important to note that, if the geometrical dimensions of the
minichannel had been different, the difference in the temperature along the minichannel length would have
resulted in changes in the minichannel shape, i.e. its local narrowing, a reduction in the heat transfer efficiency,
and, finally, a local change in the fluid flow rate.
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02096 
DOI 
Web of Science