Numerical simulation and experimental tests of the filter with a rotating cylindrical perforated filter element

Abstract

There is a need to clean various liquids of solid impurities in almost all areas of human activity. The filter design with a rotating cylindrical perforated filter element was proposed to address this topical technical problem. Its work based on the principle of rotational filtration. The experimental studies demonstrated that with a rotating cylindrical perforated filter element could remove more than 90% of the admixture particles. This took place in defined fluid motion modes, which characterized by the dimensionless Reynolds numbers. In the present study, numerical simulation was carried out for an investigation of the hydraulic oil motion and solid admixture particles' motion in the filter. The simulation results showed a local increase velocity in the holes of the perforated filter element. It entails the passage of a very small particle number into the filtrate. A comparison of the numerical simulation results of filter cleaning efficiency with the data of physical experiments showed a rather good agreement, the discrepancy between which is less than 9%.

On the Added Modal Coefficients of a Rotating Submerged Cylinder Induced by a Whirling Motion—Part 2: Numerical Investigation

“…𝐶 and 𝐴 were calculated directly from Equations ( 16) and (18), respectively. In order to separate the contributions of 𝑀 and 𝐾 in Equation (15), a new simulation was performed which consisted of forcing the fluid-structure interface to rotate and deform statically according to 𝛷 scaled by ℎ.…”

“…C f and A f were calculated directly from Equations ( 16) and (18), respectively. In order to separate the contributions of M f and K f in Equation (15), a new simulation was performed which consisted of forcing the fluid-structure interface to rotate and deform statically according to Φ f 1 scaled by h. Under these circumstances, F f q 1 q 1 in the direction associated with Φ f 1 is only induced by q 1 as well as its corresponding added modal coefficient, and F f q 2 q 1 in the direction associated with Φ f 2 is only induced by q 1 as well as its corresponding added modal coefficient, as shown in Equations ( 19) and (20) and Figure 4:…”

“…and using the shear stress transport (SST) model which combines the k-ω model near the walls and the k-ε model away from the walls. The SST and other similar turbulence models have already been used in the research of whirling flows with excellent results [18][19][20]. The turbulent viscosity, ν t , can be calculated as:…”

Modeling of Filtration Phenomenon in Hydrostatic Drives

“…To determine the impact of selected filtration system parameters on the separation of contaminants in hydrostatic drives, experimental or model studies can be carried out [27][28][29][30][31][32][33]. Experimental analyses involve the verification in various arrangements of filters with different parameters in the tested drive systems with different compositions, to which contaminants are introduced.…”

Numerical and Experimental Study on Nonlinear Phenomena and Thermal Deviation Control in a 1000 MW Tower-Type Boiler

“…For the simulation of turbulent flow in furnaces, there are many ways to simulate turbulent flow. Some scholars [41,42] adopted an SST k-ω model. To make it easier for the computation to reach convergence, other scholars [43] have successfully used RNG k-ε simulations to simulate turbulent flow in boiler furnaces.…”