Abstract
The heat transfer equipments with higher heat transfer ability are needed in several industrial applications. With conventional methods, size of the device increases and it becomes bulky. With the use of metal foam, it is possible to attain large ratios of surface to volume. Therefore, using metal foam in heat exchanging devices is crucial. The main reason behind the use of metal foam over conventional method is its weight-saving and impact-absorbing structures. Insertion of metal foam in heat exchangers for various applications can lead to greater effectiveness and heat transfer enhancement. It has been observed that very few researchers have participated in the area of double tube heat exchangers (DTHE) having annular spaces filled with metal foam. The present work deals with numerical and CFD analysis of double tube heat exchanger (DTHE) with metal foam having different pore densities differing from 10 PPI to 50 PPI & performance evaluation of the same by taking hot water stream and cold water stream as working fluids. The modelling was created in Creo & simulation was done with k-omega (2 equation) viscous model in Ansys fluent flow. In the present work, double tube heat exchanger was considered in counter flow mode with inner sided tube (Stainless Steel) ID 9.5 mm & OD 12.7 mm and outer sided tube (Galvanized Iron) ID 28 mm & OD 33.8 mm. For fully developed turbulent flow, total length was considered as 1.5 m. The water streams through inner tube and annular space were flowing at uniform and constant flow rates of 2 lpm and 10 lpm respectively. Hot water and cold water inlet temperatures were taken at 800c & 300c respectively. For the analysis nickel metal foam with 10 PPI to 50 PPI with 0.9 porosity was inserted in the annular spaces of DTHE. For different pore densities comparative analysis was done. It was found that with rise in pore density of metal foam heat transfer rate (HTC) and pressure drop increased for both numerical & mathematical results. CFD simulation results were in good agreement with results obtained from empirical correlations taken from literature.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
