[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$f4WC0In6uqt3GX_F40Manc4Wu-ooh25JyNHYsc1d2ARE":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":12,"question":19,"related":20,"source":31,"type":32},[],"2023-11-18 04:59:22",106427596,[8,9,10,11],"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",{"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","对于斜平板的降膜流动,下列说法正确的是( )",[21,33,42,51,60,68,77,86,95,104],{"answer":22,"createTime":23,"id":24,"options":25,"question":30,"source":31,"type":32},[],"2023-11-18 04:59:21",106427575,[26,27,28,29],"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","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\">","v1",0,{"answer":34,"createTime":23,"id":35,"options":36,"question":41,"source":31,"type":32},[],106427577,[37,38,39,40],"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":43,"createTime":23,"id":44,"options":45,"question":50,"source":31,"type":32},[],106427578,[46,47,48,49],"\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":52,"createTime":23,"id":53,"options":54,"question":59,"source":31,"type":32},[],106427579,[55,56,57,58],"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":61,"createTime":23,"id":62,"options":63,"question":67,"source":31,"type":32},[],106427581,[64,65,66,58],"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":69,"createTime":23,"id":70,"options":71,"question":76,"source":31,"type":32},[],106427586,[72,73,74,75],"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":78,"createTime":23,"id":79,"options":80,"question":85,"source":31,"type":32},[],106427588,[81,82,83,84],"\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":87,"createTime":23,"id":88,"options":89,"question":94,"source":31,"type":32},[],106427591,[90,91,92,93],"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":96,"createTime":23,"id":97,"options":98,"question":103,"source":31,"type":32},[],106427594,[99,100,101,102],"\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":105,"createTime":5,"id":6,"options":106,"question":19,"source":31,"type":32},[],[8,9,10,11]]