Analysis of Parallel Flow Double Pipe Heat Exchanger using GW70/Cu Nanofluids | Chapter 3 | Research Developments in Science and Technology Vol. 7

 The Nusselt number, total heat transfer, and convective heat transfer coefficients of glycerol-water-based Cu nanofluids operating in a parallel flow double pipe heat exchanger are calculated using CFD analysis. A single-phase fluid approach method is used in the study. The Ansys 19.0 workbench was used to develop the heat exchanger model. Heat transfer tests with nanofluids at three flow rates (680 water had mass flow rates of 0.2, 0.017, and 0.0085 kg/s in the tube, whilst nanofluids have mass flow rates of 0.03, 0.0255, and 0.017 kg/s in the annulus) were conducted in a laminar developing flow zone. The average temperature of nanofluids is 36°C, while the average temperature of hot water is 58°C. In comparison to base liquid, the overall heat transfer coefficient and convective HTC of 1.0 percent copper nanofluids at 0.03 kg/s are raised by 26.2 and 46.2 percent, respectively. When the experimental and CFD findings are compared, they are found to be quite comparable.

Author(s) Details:

M. L. R. Chaitanya Lahari,
Department of Mechanical Engineering, Malla Reddy College of Engineering and Technology, Hyderabad-500100, India.

V. G. Krishna Anand,
Department of Aeronautical Engineering, Malla Reddy College of Engineering and Technology, Hyderabad-500100, India.

P. H. V. Sesha Talpa Sai,
Department of Mechanical Engineering, Malla Reddy College of Engineering and Technology, Hyderabad-500100, India.

Please see the link here: https://stm.bookpi.org/RDST-V7/article/view/7075

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