2026-04-23T11:43:14Zhttps://ebiltegia.mondragon.edu/oai/request

oai:ebiltegia.mondragon.edu:20.500.11984/58742024-03-04T17:09:09Zcom_20.500.11984_473col_20.500.11984_478

00925njm 22002777a 4500 dc Martin-Mayor, Alain author Souto, Iñigo author Bou-Ali, M. Mounir author 2022 In this article, CFD simulations results are presented as a key tool to the comprehension of the target gas concentration evolution in a test chamber, at different working conditions. The simulation results are compared with the experimental data, which shows a qualitative good correlation with the evolution of the concentration gradient detected. The experiments were carried out using an aluminum gas test chamber, where a WO3 based conductometric sensor is introduced. The results demonstrate how the response time is dependent on the sensor working conditions. Analyzing the CFD and experimental results, some assumptions for this behavior are proposed. The WO3 sensor needs a Pt heating element, which is heated up to 300 °C. As the response is highly temperature-dependent, the temperature distribution on the sensor surface was measured by an IR thermographic camera. The simulation results show that the temperature distribution matches with those obtained experimentally. To validate the model, a mesh and time step convergence study was also implemented. 0925-4005 https://katalogoa.mondragon.edu/janium-bin/janium_login_opac.pl?find&ficha_no=167715 https://hdl.handle.net/20.500.11984/5874 Computational fluid dynamics (CFD) Conductometric gas sensor Gas flow Chamber-position influence Influence of the test-chamber shape on the performance of conductometric gas sensors