Passive tear suctioning force can be demonstrated by a Venturi tube model. 被动性泪液吸引之力量，可藉由文氏管模型来解释。
The circumferential strains at the outer surface of the model are measured with strain gages after the tubes are pulled out of the model. 应用电阻应变片测量了换热管从单管模型中拉出后该模型外表面的周向应变，并根据弹性理论从周向应变计算出残余接触压力的实验值。
