[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fJHowWb-gWteSLz7kJQLaSOW_zNpOINtJbERga-Dv6-M":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":12,"question":19,"related":20,"source":24,"type":25},[],"2023-11-18 04:59:21",106427575,[8,9,10,11],"输入输出面的速度相等","输入输出面的切应力大小相等","输入输出面的法向应力大小相等","垂直于y轴的表面也存在切向力",{"count":13,"courseId":14,"courseImg":15,"courseName":16,"workId":17,"workName":18},14,"2162f9dbcc8806dcc029384333297f9c","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F9a8e7a1204f7a46f0d627399a0d5355a.png","工程流体力学基础","6ca23289f8b440eaa220a28a80a5025f","第5章 单元自测","某不可压缩流体的一维层流流动取一微元控制体,如图,1面和2面分别为输入和输出面,下列说法错误的是( )\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fe53aef35ae79ba9f450345e76d861cf9.png\">",[21,26,35,44,53,61,70,79,88,97],{"answer":22,"createTime":5,"id":6,"options":23,"question":19,"source":24,"type":25},[],[8,9,10,11],"v1",0,{"answer":27,"createTime":5,"id":28,"options":29,"question":34,"source":24,"type":25},[],106427577,[30,31,32,33],"管中心速度最大","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F9cd9a715bd9dfab3a717973e647919a8.webp\">","管中心速度梯度为零","管壁的速度梯度最大","对于圆管内充分发展的不可压缩流体的稳态层流流动,下列可用作边界条件的是( )",{"answer":36,"createTime":5,"id":37,"options":38,"question":43,"source":24,"type":25},[],106427578,[39,40,41,42],"\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F2cd56fe6a65e7723a3565233ec6fbbe9.webp\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F4715aeb135c98b32db83f5b3d085cb6b.webp\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F93ed7755a3cc61ca5885da632a6905cf.webp\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F74759c9e95669be170b383c70eab8e8a.webp\">","如图圆管内的流动,距离为L的两截面上,压力表测得的压力分别为\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F559bf1f44baf7b388afe2c0469adea4f.webp\">、\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F68accc299427eca36e307e560478aebe.webp\">,重力方向与轴线的夹角为\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F03a4216bf6c310516bb95b7136caaee9.webp\">,则次两截面间的摩擦压力降为( )\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F07bcea7aa61b75c6d687330b997ea7cf.png\">",{"answer":45,"createTime":5,"id":46,"options":47,"question":52,"source":24,"type":25},[],106427579,[48,49,50,51],"流场的静压力分布方程","以应力表示的微分方程","流场的速度分布方程","流场与设备之间的受力","对微元体应用质量守恒方程、动量守恒方程后可得到( )",{"answer":54,"createTime":5,"id":55,"options":56,"question":60,"source":24,"type":25},[],106427581,[57,58,59,51],"切应力分布方程","速度分布方程","微元体的受力","对微元体应用质量守恒、动量守恒以及表面力与速度梯度的关系方程后,可得到( )",{"answer":62,"createTime":5,"id":63,"options":64,"question":69,"source":24,"type":25},[],106427586,[65,66,67,68],"左右面输入输出速度相等","左右面的切应力大小相等","上下两面的切应力大小相等","前后两面无切应力","不可压缩的一维层流流动,取微元体如图所示,下列说法错误的是( )\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fe53aef35ae79ba9f450345e76d861cf9.png\">",{"answer":71,"createTime":5,"id":72,"options":73,"question":78,"source":24,"type":25},[],106427588,[74,75,76,77],"\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Ff3a9667512fbc3ed6b438ce9da10e0d2.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F1d8fdaebd5cb6b8b11cf256907f7fbca.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F611d18b6727f79c22d3c70248c242e2e.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fcd06e746aabd4991e203572569370079.png\">","对于圆管内充分发展的不可压缩流体的稳态层流,流动截面上的切应力分布为( )",{"answer":80,"createTime":5,"id":81,"options":82,"question":87,"source":24,"type":25},[],106427591,[83,84,85,86],"沿x方向线性增大","沿x方向不变","沿x方向线性较小","沿x方向二次曲线增大","对于水平狭缝流动,流动方向为x方向,则\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fcf588f4cfd82b4ccc6e49e617ba6d3a1.webp\">( )",{"answer":89,"createTime":5,"id":90,"options":91,"question":96,"source":24,"type":25},[],106427594,[92,93,94,95],"\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F6d833381b107569c880bd1031ab9ef05.webp\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F20fa8a4d8c592bea47430068f304287b.webp\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F3bd01740ad4c3250cbbeb0e0ee196402.webp\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F947cf70bc3f80ade79cb3b15037575a2.webp\">","一水平圆管,如图,管内流体不可压缩且充分发展,1和3,2和4分别为两截面上的对应点(对应点连线沿轴线方向),重力向下,且管内重力引起的压力变化不可忽略,对各点压力情况说法正确的是( )\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fecc04be13d4cb2d0924f6716305341bb.png\">",{"answer":98,"createTime":99,"id":100,"options":101,"question":106,"source":24,"type":25},[],"2023-11-18 04:59:22",106427596,[102,103,104,105],"切应力呈抛物线分布,速度程线性分布","切应力和速度均呈抛物线分布","切应力和速度均呈线性分布","切应力呈线性分布,速度程抛物线分布","对于斜平板的降膜流动,下列说法正确的是( )"]