원래 다 정리해서 일찍 올려보려고 했는데실험 시험때문에 여의치 않았네요ㅠ더 늦어지기 전에 1차시험범위 용어정리라도 올려봐요!영타가 느려서 문자 및 몇몇 영단어는 그냥 한글로 쓸게요ㅎㅎ많이 늦어서 몇분 못보시겠지만 그래도 조금이나마 도움이 됐으면 하네요!저지른 일도 있고 해서ㅠㅠ 굽신굽신공부를 조금 하시고 보시면 더 도움이 될 것 같네요~그럼 모두 기말고사 잘 보시길 바랍니다!----------------------------------------데보라 넘버(19장에 또 나오지만 옛날 개념도 알아놓으면 좋을것 같네요)-디멘전리스 넘버.De = Tc/TpTc > time for characteristicTp > time for phenomenon즉 관찰자의 입장 / 현상이 일어나는 시간 으로De가 작을수록 fluid에 더 가깝다고 할 수 있겠네요!continuum hypothesis-fluid의 볼륨을 ->0으로 lim할 때 fluid의 elements dimension이 무작정 0으로 가는 것이 아닌, molecular dimension과 fluid elements dimension >> molecular dimension의 관계를 이룸으로써 분자수준에서 일어날 수 있는 variation과 noise를 무시하여 평균값으로 계산이 가능하게 해주는 가정viscosity-shear stress : F/Ashear rate : U/H 에서viscosity = shear stress / shear rate로 어떠한 유체의 점성의 점도를 나타낸다.Newtonian fluid-fluid의 viscosity는 보통 shear rate와 온도 T의 함수로 나타내어 지는데, Newtonian fluid는 f(T)의 거동을 보이는 유체로 shear rate의 변화에도 viscosity가 일정한 유체를 의미한다.Non-뉴토니안 플루이드-위와 달리 viscosity가 f(shear rate, T)의 거동을 보이는 fluid로 대표적으로 shear thinning, shear thicking, Bingham plastic 등이 있다.Reynolds number-정의적으로는 유체의 work에 있어서 inertial force와 viscous force의 비를 나타낸다. 즉 f(Re) = Fi / Fv이며 Re는 유체의 흐름 형태나 프릭션펙터(f)를 결정짓는데 중요한 지표적 역할을 한다.Friction factor-Fk= Akf를 만족하는 factor로 이때Fk : force by the fluid motionA : characteristic areak : kinetic E / Unit volumef : friction factor 로Re와 f는 모두 버킹험 파이 theorem을 이용하여 구한 무차원수이다.smooth pipe-only pressure-driven flow, f = f(Re)wall effect- Dc에 비해 Dp가 상대적으로 커서 유체의 흐름이 원활하지 못해 Cd 값이 Cd(Re)가 아닌 Cd(Re, Dp/Dc)로 나타나는 현상

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