Boiling heat transfer from a vertical wall subjected to an inclined wall attachment

Nucleate boiling in a restricted geometry formed by an inclined wall attachment in line contact with a vertical heating wall is studied for different cases of attachment orientations with respect to the direction of gravity. The pool boiling experiment was conducted with an electrically heated metal foil boiling water at atmospheric pressure. The test results show that in all cases, nucleate boiling is significantly enhanced in the restricted region near the contact line where stagnant liquid provides a favorable thermal environment for formation of vapor phase. Both the local heat transfer and critical heat flux data are presented and compared for different cases. The test results can be applied to explain enhanced nucleate boiling heat transfer from structured surfaces.