Crud on a Surface: Temperature

Where to begin learning about  the effect of “crud” deposits on surface temperature, dry-out and pressure drop, with forced convection boiling of water at 69 bar in an annular test section? A good place to begin is the study:

An investigation into the effect of ‘crud’ deposits on surface temperature, dry-out and pressure drop, with forced convection boiling of water at 69 bar in an annular test section,” R. V. Macbeth, R. Trenberth, R. W. Wood, volume 42 of Atomic Energy Research Establishment, 1972.