Numerical on heat transfer enhancement of nanofluids for cooling gallery of piston

作者：Wang Peng; Lü Ji Zu; Bai Min Li; Wang Yu Yan; Zhang Liang

来源：Transactions of CSICE, 2013, 31(4): 360-366.

• Conventional engine
• Diamond nano-particles
• Empirical formulas
• Heat Transfer enhancement
• Nanofluids
• Oil distributions
• Transfer capacities
• Transient heat transfer process

Diamond nanoparticles are added into the conventional engine oil to form a new type of nanofluids, which is further used as the cooling medium for piston gallery. Level Set method is introduced based on the traditional VOF method to achieve a new model. Transient heat transfer processes of diamond nanofluids with varied concentrations inside the piston gallery are discussed with a coupled arithmetic. Results show that addition of nanoparticles does not change the oil distribution obviously. However, due to the changes in the physical properties of the nano-oil, the overall heat transfer capacity is greatly improved. Heat transfer coefficients of diamond nano-oil with the volume fractions of 1%, 2% and 3% increase by 12.01%, 29.14% and 44.33%, respectively. Numerical simulation agrees well with the empirical formula with maximum error of 16.68%.

• 出版日期2013