Experimental investigation of local processes in pool boiling along the entire boiling curve

Reconstruction of local heat fluxes in pool boiling experiments along the entire boiling curve from high resolution transient temperature measurements

“…In this section, we focus on a particular IHCP defined in a control volume covering 36 MTCs in pool boiling experiments [12].…”

“…A copper layer of 2.5 lm thickness is sputtered on the surface to create a T-type thermocouple. The thermocouple wires below the surface do not influence the surface characteristics [12]. The schematic setup of the MTCs and the test heater section are depicted in Fig.…”

“…An adequate understanding of the various physical effects can only be obtained if high resolution measurement techniques are employed [12]. One particular technique constitutes of microthermocouples with the tips very near (3.6 lm) to the surface in a test heater.…”

“…The temperature readings in the heater volume provide indirect information on the surface temperature, the surface heat flux distribution as well as the wetting characteristics on the surface. This kind of experimental approach has been taken in recent years at TU Berlin [12]. Fig.…”

Measurement of Boundary Conditions - Surface Heat Flux and Surface Temperature

“…Furthermore, in order to determine the distribution of heat flux and temperature on the boundary in detail, we need to solve the two-dimensional IHCP, which requires the temperature sensors to have a high spatial resolution. We therefore introduced special micron-sized thermocouples that share a single positive pole (Enomoto & Furuhama, 1984;Buchholz et al, 2004;Liu & Takase, 2009). A schematic illustration of the thermocouples is shown in Fig.…”