Abstract
Solving the Inverse Heat Conduction Problem (IHCP) is a common approach to estimate the surface heat fluxes involved in transient, quenching experiments. The inverse problem presents several challenges, such as accounting for the non-uniqueness of its solution, for the effects of noise, or for other practical issues affecting the experimental input data, such as the thermal contact of the internal temperature sensors. In this paper, possible sources of inaccuracy in the IHCP solution and their effect on the estimated surface heat flux in experiments on quenching by water jet impingement are systematically investigated. A “virtual experiment” approach is followed to analyze the effect of a noise cancelling technique, the ambiguity in initial conditions and the quality of the thermocouple contact on the accuracy of the heat flux estimations. The results show that the invalid assumption of perfect thermal contact between thermocouple and test plate leads to overestimation of surface temperature in the initial stages of quenching. Based on these results, two measures are proposed to avoid misinterpretation of quenching heat flux estimations when solving the IHCP.
Original language | English |
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Article number | 122953 |
Number of pages | 10 |
Journal | International Journal of Heat and Mass Transfer |
Volume | 194 |
DOIs | |
Publication status | Published - 15 Sept 2022 |
Bibliographical note
Funding Information:This research was carried out under project number F41.5.14525 in the framework of the Partnership Program of the Materials innovation institute M2i ( www.m2i.nl ) and the Foundation of Fundamental Research on Matter (FOM) ( www.fom.nl ), which is part of the Netherlands Organization for Scientific Research ( www.nwo.nl ).
Keywords
- Boiling curve
- Inverse heat conduction problem
- Quenching
- Thermal contact
- Water jet impingement