2. Objective
1) To investigate of solid-liquid mixture flow characteristics in a slim hole annulus
2) Effect of pipe rotation, fluid property, annulus inclination on the particle transport velocity, transport efficiency and pressure drop
3. Theoretical background
3.1 Reynolds number
Reynolds number can be defined for a number of different situations where a fluid is in relativ
1. 서론
1.1. 연구배경 및 목적
기존의 프로펠러에 대한 연구결과로는 추력이 발생할 때 설정된 부하계수와 프로펠러 효율의 관계와 일정한 속도와 밀도, 형상면적에 대한 간략한 결론을 내릴 수 있었다. 하지만 속도와 면적을 알아낼 수 없었을 때 부하계수와 프로펠러 효율에 대한 관계와 cavitatio
Assumption
Steady-state
potential energy & non-flow work are negligible
Continuity Eq.
Analysis
△P doesn’t change nearly
When (A₂/A₁) is smaller than 0.1.
☞ Even though (A₂/A₁) is smaller than 0.1,
actual effect is not remarkable.
Pressure inside fan : 101325-599=100726Pa
Inside pressure is lower than atmosphere
Air flows into inside
5.2 Drug Delivery System
5.2.1 Advantage of Nano-drug delivery system
By diagnosis, and for treatment, we need enhanced drug delivery system. Drug delivery system of these days is just eat and let it flow through the body. It is not good at efficiency. Because the digestive system sometimes digest and remove the drug before it reaches to the target.
For enhancing the efficiency of drug
and riffle are constructed considering the original slope and flow. Riffle was made of gravels, therefore not settled successfully. Stepping stones installed in several place also function like riffle.
Lastly, a riverside wetland was constructed in the stream. It was supposed to be a site for removing pollutants and controlling water flow like other wetlands but destructed after some flood.