The velocity , turbulent intensity , and reynolds stress of the liquid was measured with ldv , while the hold up , velocity of gas were measured with piv
2.
In the near bed region , the turbulent intensities are elevated above those of water at a rate proportional to particle size due to collisions and velocity gradient
3.
The turbulent intensity and frequency of the sediment - laden flow are less than those of the clear water flow , but the fundamental structure of the flow remains unchanged
4.
While in the upper region , the turbulent intensities of water exceed those of the particles . light particles possess higher turbulent intensities than the heavy ones of the same size
5.
2 , application of the modified k - e model by munk - anderson equation to gravity flow in reservoir shows that the modified model overestimates the turbulent intensity in reservoir . it results enhance of momentum exchange in vertical direction and large error in velocity
6.
By performing fourier transformation , the relationship between the turbulent intensity of the particle and that of the carrier fluid was obtained which makes clear that particle size , specific gravity , velocity gradient , and the characteristic frequency of energy - containing eddies are four basic influencing parameters . it is proven theoretically that under certain conditions , the stream - wise and transverse particle turbulent intensities exceed those of the carrier fluid . based on the equations of two - phase flow , the presence of fine sediment suspension is shown to attenuate the turbulent intensity of the water
7.
The results of strehl ration calculation after low - order modes and tilt part correction at varies atmospheric turbulent intensity and phase spectrum descend efficiency are discussed detailed . the effect o . f laser beam transmission in the turbulent atmosphere with 4 - dimension numerical analog program as well as phase compensation for adaptive optics are studied
8.
It is showed that numerical calculation could give the same position of separation line with the cold gas simulation . however , numerical simulation result is of a little deferent from cold gas simulation in some details , such as recirculation velocity and turbulent intensity . the main problem of numerical simulation is that the turbulent model is not perfect , and the computational grid is not precise enough
9.
( 2 ) before and after the frames are placed the velocity vertical distribution in the same cross - section are measured by adv . the results indicate that after the frames are placed the mean velocity and turbulent intensity near bed are reduced , and vertical distribution of turbulent intensity is more uniform
10.
The motion characteristics of the suspended particles were obtained by statistical analysis , including vertical concentration distribution , mean velocity profile , turbulent intensity , velocity correlation , and the probability density distribution of the velocity fluctuations . attempt has also been made to interpret the turbulent characteristics in terms of particle properties and turbulence structure
मोबाइल