In this article we present solution for experimental studies in natural convection heat transfer. This work is based on the use of thermoelectric sensors conceived in our laboratory and which allowed us to measure heatflux and then convective exchange coefficient. First, we present the sensor and the calibration methods, then for experimental validation we work in the classical case of laminar free convection heat transfer along a vertical and isothermal plate. Local heatflux density are measured in several configurations and the results are compared with others obtain by another experimental way (temperature profiles in the boundary layer).

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