Transient contact heat transfer measurements based on high-speed IR-thermography

Investigating the influence of macroscopic surface structures on the thermal contact conductance using infrared thermography

“…The experimental setup used is similar to the outlined design in Burghold et al [15,16] and also shown in Figure 1. The framework of this setup consists of a custom-made servo-hydraulic material testing system, providing maximum forces up to 100 kN.…”

“…This controller regulates the applied force on the specimen pairing and allows for an overshooting of the target load before reaching steady state pressure as exemplarily shown in Figure 1. This effect has been used in previous investigations to mimic oscillating forces [15,16]. The pressing process itself is recorded with an Infratec ImageIR 5300 infrared camera equipped with a macro lens, providing an optical resolution of 25 m/pixel.…”

“…This problem is characterized by knowing the effect of an acting boundary condition or thermophysical property rather than the property itself. A common approach to solve this problem is the conjugate gradient method which has been presented in many publications [15,[18][19][20][21]. Therefore, only a short summary is outlined here.…”

“…Used experimental setup[15]. A close-up of the specimen geometry shows the investigated specimen front for temperature measurements.…”

Steady‐state estimation of thermal contact conductance between sliding disk and stationary cylinder with similar/dissimilar materials under the isothermally heated boundary condition

“…In numerical thermomechanical simulations of the CHT, the microscale interface could be created stochastically using surface topography descriptors. 32,33 They could be also monitored by optical profilometry 34 for particular applications or by 2D stylus-based surface profilers. 35 The stochastic approaches for metal-metal contacts could be generalized to approximate the electrical contact resistance (ECR) in electrical power connectors.…”