Due to global demand of conservation and optimization of energy consumption it is very important to analyze the convective heat flow field and find out the detailed clarification of the convective flow parameters. While due to the complexity of convective flow fields both in forced and natural convection, it has remained very difficult to have three dimensional (3D) experimental analyses in detail. Image processing and measurement has got a very important role in finding solutions in this regard. For this purpose both steady and unsteady quantitative analysis of flow fields has to be analyzed separately, as they have got different density values throughout the flow field. This paper deals with quantitative image and CT analyses of natural convection using color-stripes background oriented schlieren (CSBOS) method from a heat generating source in natural atmospheric conditions.

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