Analytical and numerical calculation of surface temperature and thermal constriction resistance in transient dynamic strip contact

• Published in: Applied thermal engineering Vol. 31; no. 8; pp. 1527 - 1535
• Main Authors: Aderghal, Nadia, Loulou, Tahar, Bouchoucha, Ali, Rogeon, Philippe
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier Ltd 01.06.2011; Elsevier
• Subjects: Applied sciences; Biot number; Constrictions; Contact; Dimensionless constriction; Energy; Energy. Thermal use of fuels; Exact sciences and technology; Half spaces; Heat flux channel; Heat transfer; Mathematical analysis; Mathematical models; Moving strip heat source; Steady state; Strip; Surface temperature; Theoretical studies. Data and constants. Metering; Thermal resistance; Surface temperature; Heat flux channel; Moving strip heat source; Thermal resistance; Dimensionless constriction; Cooling; Unsteady state; Computation code; Heat flow; Half space; Modeling; Steady state; Heat flux; Finite element method; Numerical analysis; Heat transfer
• ISSN: 1359-4311; 1873-5606
• DOI: 10.1016/j.applthermaleng.2011.01.044

In this paper, the problem of transient heat transfer in sliding contact is studied analytically and numerically. The heat source is represented as a uniform heat strip moving over a half-space with and without cooling outside the contact zone. The finite element method, implemented using a commercial code, was used in numerically solving this problem. An analytical solution taken from the literature was adapted to obtain the presented model and used to check the capabilities of the commercial code. After the validation of the resolution method, the work was completed by studying the influence of the Peclet number (source speed) and the Biot number (presence of cooling) on the temporal and spatial evolution of the surface temperature of the half-space. Finally, the transient constriction function is estimated and analyzed for the presented test cases. Correlations were also derived to (i) evaluate the time interval within which the steady state is reached, and (ii) estimate the constriction parameter as a function of Peclet and Biot numbers in the steady state case. ► A new form of Jaeger's analytical solution of moving heat source strip on half space is derived. ► The velocity increase reduces the penetration of heat in the half space in presence of convection. ► Influence of cooling on reached temperature level is analysed analytically and numerically. ► Convection over half space has a significant effect on the temperature at a low Peclet number. ► Basic correlations for calculating the steady state time are presented.