Based on Darcy-Brinkman Model, a theoretical study of laminar film condensation on a vertical tube surface with thin porous coatings was carried on.

• 假设：（1为无限大空间；（2层流膜状凝结；（3凝结为二维轴对称；（4）凝液与蒸汽之间无两现区；（5）忽略对流项和惯性项。