Unsteady thermotopography of slabs with inner cavities
Abstract
Numerical and experimental investigations of conductive heat transfer in slabs with inner cavities were performed. The numerical model examined cavities with circular or square cylindrical and spherical geometry. The initial conditions assumed a constant temperature across the slab, while the boundary conditions assumed adiabatic walls for the cavity and one of the slab surfaces with the other surface brought to a temperature constant in time. A combination of the finite difference and finite element methods was used for the analysis. The experimental tests were conducted on steel and polyester resin models with circular cylindrical cavities. The specimens were heated on the lower surface by a steam flow and the temperature field on the upper surface was detected using a liquid-crystal thermal mapping procedure and a scanning infrared radiometer.
- Publication:
-
Associazione Italiana di Meccanica Teorica ed Applicata, Volume 4
- Pub Date:
- 1974
- Bibcode:
- 1974itaa....4..263C
- Keywords:
-
- Cavities;
- Conductive Heat Transfer;
- Metal Plates;
- Polyester Resins;
- Thermal Mapping;
- Unsteady Flow;
- Adiabatic Conditions;
- Boundary Conditions;
- Boundary Value Problems;
- Circular Cylinders;
- Finite Difference Theory;
- Finite Element Method;
- Infrared Radiometers;
- Liquid Crystals;
- Steels;
- Wall Temperature;
- Instrumentation and Photography