INFRARED RADIATION

Author: MATILLA VICENTE CARMEN.
Year: 2004.
University: POLITÉCNICA DE MADRID [www.upm.es].
Place of defense: E.T.S.I.TELECOMUNICACION.
Place of preparation: E.T.S.I.TELECOMUNICACION (UNIVERSIDAD POLITECNICA DE MADRID).

Summary: That argument is justified by the need to achieve greater precision in the mass actions, particularly in the identification of patterns that form the vertices of the pyramids reference to the different runlevels metrological. This need stems from the fact of being the "master mass" the only physical pattern of the fundamental values of the SI, as the remaining quantities are defined in terms of fundamental constants, which facilitates the availability of patterns in space and its stability over time. The specific aim of the thesis is to advance knowledge of the influence quantities due to the effects of temperature variation affecting the determination of the actual mass of a body, specifically the determination of the forces that are created drag in their environment and alter the apparent value of the peso. The analysis has been developed on the one hand the theoretical study of the forces of drag created by a thermal variation, and also the experiment of the effects gravity flow from it. First there has been a review of the various modes of heat transfer and the study of convection currents, both free and forced, which are created in the areas of the body, due to temperature gradients exist. It has been experimentally verified this effect by combining action with thermal probes temperature readings along with the scales. In a second phase, to determine experimentally the forces of drag, it was a new experimental system basodo in infrared thermography, which for the first time has allowed the visualization and quantification of the isotherm formed within the body, and from these, the function of temperature for all points within the boundary layer, which has enabled the calculation of the velocity of air and the forces of viscosity using a mathematical model developed in the thesis. This part is the core of the thesis, and has helped quantify the forces of drag due to convection currents, considering their contribution to variations in temperature over with for the first time and setting its contribution rates below 10% . This obliges mofiicar approaches current factors influencing the extent of the estate with thermal gradients, as they are assumed as essential for the forces of drag, and we have demonstrated that although it is important minority. It is proposed that the most crucial element is to be the effects asosciados the adsorption / desorption of water vapor.