Determination of Thermohydraulic Characteristics of Reciprocating Room Temperature Active Magnetic Regenerator| Chapter 1 | Research Trends and Challenges in Physical Science Vol.8

 

 A thermohydraulic characterization of a reciprocating room temperature active magnetic regenerator was numerically carried out in this chapter, using gadolinium particles as a magnetocaloric material and water as a heat transfer fluid. For varying water inlet velocities of 0.06, 0.08, 0.1, and 0.12 m.s -1, a two-dimensional transient flow model was developed using COMSOL Multiphysics software to determine the water flow distribution in two active magnetic regenerators with cross and parallel gadolinium particle distributions. The gadolinium particles have a radius of 1.5 mm and a separation of 0.9 mm between them. Using the same software, a second two-dimensional transient coupled flow and heat transfer model was developed to characterise the convective heat transfer in the active magnetic regenerator of cross gadolinium particles distribution for the same water inlet velocities based on the simulation results of this model.

 

Author(s) Details:

G. El Achkar,
Tianjin University of Commerce, Guangrong Rd 409, Beichen District, Tianjin, 300134, China and Trinity College Dublin, College Green, Dublin 2, Ireland.


B. Liu,
Tianjin University of Commerce, Guangrong Rd 409, Beichen District, Tianjin, 300134, China.


R. Bennacer,
ENS Paris-Saclay University, 61 Avenue du Pr ´ esident Wilson, 94235 Cachan, France.

Please see the link here: https://stm.bookpi.org/RTCPS-V8/article/view/6007

Determining the Effect of Flow Variations to Vibration Tendency in a Hydraulic Manifold | Chapter 12 | New Approaches in Engineering Research Vol. 4

 A hydraulic manifold is an important component in hydraulic machinery that transports high-pressure hydraulic oil into hydraulic tubes and hoses for cleaning. Because of the high pressure used during operation, this process causes vibration and the possibility of leakage at the hydraulic manifold's exit ports. The purpose of this research is to determine the effects of pressure and velocity variations in a hydraulic manifold on vibration tendency. Computational fluid dynamics (CFD) is used in this study to simulate the hydraulic manifold fluid behaviors. under the operating conditions of the industry The results show that pressure and velocity fluctuations occur at each branch of a mainstream due to changes in area and geometrical shape. At each branch, there was a surge of pressure but a decrease in velocity. Overall, the results show that the areas closest to the inlet are the most affected. The increments have little effect on areas further downstream. According to our calculations, the vibration tendency occurs in the hydraulic manifold cavity due to differential pressure and velocity, negative pressure, low velocity, swirl flow, and back stream.

Author(s) Details

Norazhar Ali
School of Mechanical Engineering, Universiti Teknologi Malaysia, Johor, Malaysia.

Kahar Osman
School of Mechanical Engineering, Universiti Teknologi Malaysia, Johor, Malaysia.

Fazila Mohd Zawawi
School of Mechanical Engineering, Universiti Teknologi Malaysia, Johor, Malaysia.

Muhammad Noor Afiq Witri Muhammad Yazid
School of Mechanical Engineering, Universiti Teknologi Malaysia, Johor, Malaysia.

View Book :- https://stm.bookpi.org/NAER-V4/article/view/1888