The estimation of local heat transfer coefficients for two-dimensional surface-roughness elements by holographic interferometry

Holographic interferometry is applied to inspection of walls of the coolant loops of nuclear reactor facilities. Local heat transfer coefficients over vee-groove surfaces typical in coolant loop walls are estimated in order to find the local mass transfer coefficients. New polymeric surface coatings with a swelling capability were developed to facilitate holographic inspection. The test section inspected and the interferometric arrangement are described in detail, along with calibration information. The results cited are referable to developing mass-transfer boundary layers (no mass transfer upstream of the test section).