Simulation on the Flow Field of Centrifugal Pump Based on Fluent

2014 ◽  
Vol 926-930 ◽  
pp. 1743-1746
Author(s):  
An Fu Guo ◽  
Tong Wang ◽  
Ting Ting Jiang ◽  
Yun Ping Hu ◽  
Da Jiang Zhang
Keyword(s):  
Kinetic Energy ◽  
Flow Field ◽  
Energy Distribution ◽  
Turbulent Kinetic Energy ◽  
Centrifugal Pump ◽  
Flow Distribution ◽  
Kinetic Energy Distribution ◽  
Two Dimensional ◽  
Two Dimensional Flow ◽  
Velocity Pressure

In this paper, the software Fluent was employed and the two-dimensional flow fields, such as flow distribution, velocity distribution, pressure distribution, turbulent kinetic energy distribution are obtained. The results show that the flow, velocity, pressure and turbulent kinetic energy distribution are significantly different and asymmetric. The results have referenced significance for design and analysis of the Centrifugal Pump.

Numerical Simulation on the Flow Field of External Gear Pump Based on FLUENT

2014 ◽  
Vol 556-562 ◽  
pp. 1421-1425
Author(s):  
An Fu Guo ◽  
Ting Ting Jiang ◽  
Tong Wang ◽  
Yun Ping Hu ◽  
Da Jiang Zhang
Keyword(s):  
Kinetic Energy ◽  
Energy Distribution ◽  
Turbulent Kinetic Energy ◽  
Maximum Velocity ◽  
Flow Distribution ◽  
Kinetic Energy Distribution ◽  
Gear Pump ◽  
Intermediate Point ◽  
Gear Mesh ◽  
External Gear Pump

In this paper, the software FLUENT was employed and the two-dimensional flow fields of external gear pump, such as flow distribution, velocity distribution, pressure distribution, turbulent kinetic energy distribution are obtained. The results show that the pressure of the pump presents the symmetry and the maximum static pressure is 0.127 MPa at the oil absorption cavity inlet. The maximum velocity appeared in the left side of the gear pump body reached 6.97m/s and the minimum velocity reached 1.09m/s on the two gears meshing line. Turbulence kinetic energy distribution of the pump shows the symmetry and the minimum turbulent kinetic energy appeared in the two gear mesh is 0.0312m2/s2. Meanwhile, the maximum turbulent kinetic energy reached 12.2 m2/s2 at the exit of the oil cavity. The maximum exit velocity appeared at the position of the intermediate point reached 3m/s. The results have referenced significance for design and analysis of external gear pump.

scholarly journals Turbulent Kinetic Energy Distribution of Nutrient Solution Flow in NFT Hydroponic Systems Using Computational Fluid Dynamics

2019 ◽  
Vol 1 (2) ◽  
pp. 283-290
Author(s):  
Cesar H. Guzmán-Valdivia ◽  
Jorge Talavera-Otero ◽  
Omar Désiga-Orenday
Keyword(s):  
Fluid Dynamics ◽  
Kinetic Energy ◽  
Energy Distribution ◽  
Turbulent Kinetic Energy ◽  
Nutrient Solution ◽  
Kinetic Energy Distribution ◽  
Solution Flow ◽  
Flow Rates ◽  
Hydroponic System ◽  
Hydroponic Systems

Hydroponics is crucial for providing feasible and economical alternatives when soils are not available for conventional farming. Scholars have raised questions regarding the ideal nutrient solution flow rate to increase the weight and height of hydroponic crops. This paper presents the turbulent kinetic energy distribution of the nutrient solution flow in a nutrient film technique (NFT) hydroponic system using the computational fluid dynamics (CFD) method. Its main objective is to determine the dynamics of nutrient solution flow. To conduct this study, a virtual NFT hydroponic system was modeled. To determine the turbulent kinetic energy distribution in the virtual NFT hydroponic system, we conducted a CFD analysis with different pipe diameters (3.5, 9.5, and 15.5 mm) and flow rates (0.75, 1.5, 3, and 6 L min−1). The simulation results indicate that different pipe diameters and flow rates in NFT hydroponic systems vary the turbulent kinetic energy distribution of nutrient solution flow around plastic mesh pots.

Numerical Analysis of the Influence of Different-Shaped Square Cylinders on Water Flow

2012 ◽  
Vol 614-615 ◽  
pp. 604-607
Author(s):  
Jie Gu ◽  
Xiao Li Wang ◽  
Wei Chen ◽  
Xin Qin ◽  
Dan Qing Ma ◽  
...  
Keyword(s):  
Kinetic Energy ◽  
Energy Distribution ◽  
Turbulent Kinetic Energy ◽  
Water Flow ◽  
Turbulence Kinetic Energy ◽  
Kinetic Energy Distribution ◽  
Distribution Area ◽  
Square Cylinder ◽  
Square Cylinders ◽  
Contour Lines

A 3D numerical model was performed to simulate the different cases of the water flow across different-shaped square cylinders. Figures of streamlines and turbulent kinetic energy contour lines in different cases were obtained. Through the comparison of streamlines, the areas of strong turbulent kinetic energy and the strongest turbulent kinetic energy nucleus, the results indicated that,(i) two symmetrical vortexes were formed behind the regular quadrilateral square cylinder and the “⊥”-shaped square cylinder ,respectively, and the former were bigger than the latter .While the flow crossed the “±”-shaped square cylinder without forming vortex.(ii) When water flowed around different-shaped square cylinders, from the regular quadrilateral one, the “⊥”-shaped one to the “±”-shaped one, successively, the strong turbulent kinetic energy distribution area, in which turbulence kinetic energy value was above 18,gradually increased; while the strongest turbulence kinetic energy nucleus, whose value of turbulence kinetic energy was the largest among turbulence kinetic energy nucleuses in the strong turbulent kinetic energy distribution area, moved forward gradually and its area was smaller and smaller.

Effect of Feed Angle on Centrifugal Flotation Cell

2013 ◽  
Vol 448-453 ◽  
pp. 3803-3807
Author(s):  
Wen Yi Chen ◽  
Yue You Wei ◽  
Bing Sun ◽  
Kai Tang
Keyword(s):  
Kinetic Energy ◽  
Flow Field ◽  
Turbulent Kinetic Energy ◽  
Pressure Difference ◽  
Theoretical Foundation ◽  
Distribution Law ◽  
Flotation Cell ◽  
Feed Angle ◽  
Interior Flow ◽  
Velocity Pressure

Feed angle have a great effect on the flotation efficiency of self-priming centrifugal flotation cell.In order to improve the efficiency of flotation,the effect of feed angle on the flow field in a self-priming centrifugal flotation cell was investigated using STAR CCM+.The distribution law of velocity,pressure,turbulent kinetic energy under different angles was gotten.The turbulent kinetic energy and the pressure difference increased with the feed angle. Result shows that the feed angle acting on the interior flow field is significant and the feed angle of 20º is more conducive to flotation than others.Conclusion can provide a theoretical foundation for improving flotation efficiency and optimizing flotation structure.

Numerical investigation of energy loss in a centrifugal pump through kinetic energy dissipation theory

2020 ◽  
Vol 234 (19) ◽  
pp. 3745-3761
Author(s):  
Fen Lai ◽  
Xiangyuan Zhu ◽  
Guojun Li
Keyword(s):  
Energy Dissipation ◽  
Kinetic Energy ◽  
Flow Field ◽  
Energy Loss ◽  
Unsteady Flow ◽  
Turbulent Kinetic Energy ◽  
Centrifugal Pump ◽  
Cross Section ◽  
Three Dimensional ◽  
Near Wall

In this study, energy loss within a centrifugal pump is investigated by post-processing three-dimensional unsteady flow field through kinetic energy dissipation theory. The three-dimensional unsteady flow field is predicted by solving unsteady Reynolds-averaged Navier–Stokes equations. The kinetic energy dissipation consists of three parts: averaged kinetic energy dissipation, turbulent kinetic energy dissipation, and near-wall revised kinetic energy dissipation. The total value variations of three kinetic energy dissipations in the centrifugal pump with flowrate are investigated and compared. Results show that with the increase in flowrate, the total near-wall revised kinetic energy dissipation gradually increases, the total turbulent kinetic energy dissipation first gradually decreases and then gradually increases, and reaches the minimum value at the design flowrate. The total averaged kinetic energy dissipation is less than the total turbulent and the total near-wall revised kinetic energy dissipations, and the total near-wall revised kinetic energy dissipation is larger than the total turbulent kinetic energy dissipation when the flowrate is larger than 0.75 Qdes. The space variation of the near-wall revised kinetic energy dissipation with flowrate shows that large near-wall revised kinetic energy dissipation mainly occurs at the volute and transfers from the small cross-section casing to large cross-section casing and discharge pipe with the increase in flowrate. The space variations of the turbulent kinetic energy dissipation with time for three flowrates are also discussed. Results indicate that large turbulent kinetic energy dissipation near the volute tongue evidently changes with the rotation of the impeller, particularly in 0.5 Qdes. The large turbulent kinetic energy dissipation gradually expands to the pressure side of the blade when the volute tongue gradually approaches the middle of the impeller blade passage. The large turbulent kinetic energy dissipation transfers from the impeller inlet and outlet to the volute tongue and discharge pipe with the increase in flowrate. The findings of this study can serve as guide to improve the design of centrifugal pumps.

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