Naturally flows have been the scope of the scientific research for centuries,
Rayleigh-B?nard convection being one of the leading. Many researchers have
considered the flow patterns, boundary conditions, various cavities,
nanofluids, theoretically, numerically, experimentally. The flow was
investigated in atmosphere and in nano fluids, in air, water, molten metals,
non - Newtonian fluids. Almost all research focuses on 2 or 3 - dimensional
analysis of flow in laterally unlimited enclosures, as parallel plates or
coaxial cylinders. In technical practice, only limited enclosures exist.
This paper presents numerical and real experimental results for the test
chamber with ratio 4?2?1 in x, y and z direction, respectfully. The
measurements were taken at fifteen different positions on the faces of the
tank. Probes used are PT100 elements. As the chamber is limited in all
directions, the results have shown strong influence of the lateral walls.
The results are compared with the those obtained by IR camera. Various
fluids were tested, and results for motor oil will be presented.