MECHANIZATION IN AGRICULTURE
Optimization of vertical surfaces with continuous and discrete finning
The article deals with the optimization of vertical surfaces with continuous and discrete finning under conditions of natural convection. The optimization was carried out using experimental data obtained for finned surfaces made of steel, taking into account the non-isothermal temperature distribution over the surface of continuous and discrete fins. The dependences of the optimal distance between the ribs on the Rayleigh number and the geometric dimensions of the ribs are found. It was found that with a decrease in the Rayleigh number for discrete non-isothermal fins, the optimal distance between the fins increases compared to the same distance for continuous non-isothermal fins. The differences can be more than 30%. The obtained results for continuous non-isothermal fins are compared with the known results for isothermal fins. It is shown that the presence of non-isothermicity on the surface of continuous fins made of metal materials leads to the need to reduce the inter-fin distance by up to 40%. The results obtained can be useful in the design of finned surfaces under natural convection conditions.