Browsing by Author "Wadekar, Vishwas V."
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- Numerical analysis of non-isothermal Newtonian flows in plate heat exchangersPublication . Fernandes, Carla S.; Dias, Ricardo P.; Nóbrega, João M.; Maia, João M.; Wadekar, Vishwas V.Plate heat exchangers (pHE's) are widely used in chemical, pharmaceutical, biochemical processing, food, and dairy industries, offering this type of equipments several advantages like the low space requirement, high efficiency, easy cleaning and maintenance, low fouling tendency and high flexibility (Reppich, 1999). Heat transfer in a PRE is strongly dependent on geometrical properties of the chevron plates, namely on corrugation angle, area enlargement factor and channel aspect ratio. Besides tilese factors, heat transfer is also influenced by the local variation of temperature dependent physical properues and especially the variable viscosity effects (Kaka, and Liu, 2002; Manglik and Ding, 1997). The design of this heat exchange equipment involve the determination of optimum pressure drops being referenced in the literature several studies directed to this subject (Bassiouny and Martin, 1984; Leuliet et aI., 1990; Stasiek et aI., 1996; Mehrabian and Poulter, 2000).
- Numerical analysis of non-isothermal Newtonian flows in plate heat exchangersPublication . Fernandes, Carla S.; Dias, Ricardo P.; Nóbrega, João M.; Maia, João M.; Wadekar, Vishwas V.Numerical analysis of non-isothermal Newtonian flows in plate heat exchanger passages is carried out in the laminar flow region. The results of this analysis are compared with information available in the literature. Some interesting trends are observed for both heat transfer and pressure drop with varying chevron angle. Areas of further work are delineated and it is emphasised that practical ranges of inter-plate distance, corrugation pitch and the development ratio need to be studied to fully understand the practical implications of the current numerical work.