ABSTRACT
The radiators we model consist of a collection of radiator plates spaced equally along inlet and outlet pipes. The plates contain several vertical ducts in parallel. The ducts have oblong shaped, nearly rectangular, cross-sections. Fans, vertically mounted, may or may not be present (or turned on). In addition to radiator cooling, cooling also occurs from the tank walls by both natural convection to the surrounding air and by radiation. Although the oil may be pumped through the radiators, most of our designs are without pumps so that the oil flow in the radiators and coils is laminar. This determines the expressions used for the heat transfer and friction coefficients along the oil flow paths.
