物体与容器底壁部分紧密接触时的浮力情况  

Buoyancy of the object part of contact closely with the bottom wall

作　　者：袁铃[1] 拾景忠[1] 尹钊[1] 

机构地区：[1]徐州师范大学物理与电子工程学院,江苏徐州221116

出　　处：《高师理科学刊》2011年第1期63-65,共3页Journal of Science of Teachers＇College and University

基　　金：中国高等教育学会"十一五"教育科学规划课题(06AIJ0090048);江苏省教育科学"十一五"规划立项课题(D/2008/01/187)

摘　　要：针对"物体与容器底壁部分紧密接触时所受浮力与哪些因素有关"这一问题,引入不紧密接触系数k,在不考虑大气压力作用下,选取规则圆柱体和不规则柱体倒圆台为对象展开讨论.从理论分析求出物体所受浮力的表达式,通过图像给出浮力与各变量间的关系.得出结论,物体与容器底壁部分紧密接触时浮力不仅与ρ液,V排,g有关,还与物体表面积s、浸入液体深度h以及接触系数k有关.According to the problem what are the factors related with the size of buoyancy when part of the object contact close with the bottom wall,introduces loose contact coefficient k without considering the atmospheric pressure,and selects the regular and irregular cylinder as the object of study for discussing,gets the expression of the buoyancy by the theory analysis,and then give the relational graph between the buoyancy and other variables,draw a conclusion through the images that the size of buoyancy depends on not only the density of gasoline,the volume of the displaced liquid,but also on the object′s surface area,the immersion depth and the contact coefficientk.

关 键 词：浮力 紧密接触 不紧密接触系数 倒圆台 

分 类 号：O35[理学—流体力学]