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The aim of this paper is to examine whether the use of baffles in a   combustion chamber, one of the well-known low-cost methods for the boiler   performance improvement, can be enhanced. Modern day tools like computational   fluid dynamics were not present at the time when these measures were   invented, developed and successfully applied. The objective of this study is   to determine the influence of location and length of a baffle in a furnace,   for different mass flows, on gas residence time. The numerical simulations   have been performed of a simple Scandinavian stove like furnace. The   isothermal model is used, while air is used as a medium and turbulence is   modeled by realizable k-epsilon model. The Lagrange particle tracking is used   for the residence time distribution determination. The statistical analysis   yielded the average residence time. The results of the computational fluid   dynamics studies for different baffle positions, dimensions and flow rates   show from up to 17% decrease to up to 13 % increase of residence time. The   conclusion is that vertical position of the baffle is the most important   factor, followed by the length of the baffle, while the least important   showed to be the mass flow. [Projekat Ministarstva nauke Republike Srbije,   br. III 43008: Development of methods, sensors and systems for monitoring of   quality of water, air and land

Scandinavian baffle boiler design revisited