The numerical modeling and the infrared thermography applied to the detection of fluids nature in pipes

摘要

The development of numerical methods has made the numerical simulation an important tool in industry and in research fields. In this paper, we present a, numerical simulations, intended to show the ability of the non-destructive thermal control method in detecting the nature of fluid flowing in a given pipe. We examined two kinds of pipe, steel and PVC containing each three different liquids: water, thermal oil, and ethanol. We considered incompressible liquids in laminar flow in steady state. The obtained results, in form of thermographical images and spatial distribution of temperature on the pipe surface are interesting and they show that temperature responses can inform us about the nature of fluid flowing inside the inspected pipe. The modeling was carried out using a calculation software based on the finite element method.