NOVATEUR NOVATEUR NOVATEUR NOVATEUR PUBLICATIONS PUBLICATIONS PUBLICATIONS PUBLICATIONS INTERNATIONAL JOURNA INTERNATIONAL JOURNA INTERNATIONAL JOURNA INTERNATIONAL JOURNAL OF INNOVATIONS IN L OF INNOVATIONS IN L OF INNOVATIONS IN L OF INNOVATIONS IN ENGINEERING RESEARCH ENGINEERING RESEARCH ENGINEERING RESEARCH ENGINEERING RESEARCH AND TECHNOLOGY [IJIE AND TECHNOLOGY [IJIE AND TECHNOLOGY [IJIE AND TECHNOLOGY [IJIERT] RT] RT] RT] VOLUME 1, ISSUE 1 NO VOLUME 1, ISSUE 1 NO VOLUME 1, ISSUE 1 NO VOLUME 1, ISSUE 1 NOV-2014 2014 2014 2014 1 | Page 3D FLOW ANALYSIS OF HEAT TRANSFER IN A SCRAPED SURFACE HEAT EXCHANGER (SSHE) S.C.Rajesh, Assistant Professor Department of Mechanical Engineering/ Solapur University/ VVPIET College, Solapur, India Rajesh.sc044@gmail.com Dr. B. Sadashive Gowda, Professor Principal, VVCE Mysore, India principal@vvce.ac.in Dr. G.S.V.L. Narasimham Chief Research Scientist, Dept of Mechanical Engineering. IISc Bangalore, India mecgsvln@mecheng.iisc.ernet.in Abstract This paper deals with numerical analysis of 3D model of an SSHE is developed in order to study the fluid flow and heat transfer with a steady state laminar, non-isothermal flow of pure glycerine, which can be treated as a Newtonian fluid. The variation of the local heat transfer coefficient based on the inner wall temperature and bulk fluid temperature as a function of the main process parameters, namely, rotational Reynolds number (Re rot ), axial Reynolds number (Re axi ) and number of scraper blades (2, 3 and 4), is obtained. The results have shown that viscous dissipation has a significant effect on the cooling of glycerine. The local heat transfer coefficient increases slightly when increasing the number of scraper blades. Larger increases of the same occurred with higher rotational Reynolds number and axial Reynolds number. A correlation of the average Nusselt number is obtained in terms of the rotational and axial Reynolds numbers. This is expected to be useful in the design of SSHEs handling highly viscous fluids. Keywords— scraped surface heat exchanger; Newtonian fluid; inner wall temperature; Bulk fluid temperature; Local heat transfer coefficient Introduction SCRAPED SURFACE HEAT EXCHANGER (SSHE) is a device which consists of an annular gap with a cylindrical rotor and stator as shown in Fig 1.1. Scraping means removal of fluid from the boundary. This breaks the thermal and hydrodynamic boundary layers at the surface and there by enhances the heat transfer. Specifically SSHEs is used for the thermal treatment of high-viscous fluids. SSHE is widely used in food industry for sterilizing or cooling highly viscous fluids such as mayonnaise, cream cheese, peanut butter and ice cream. As the treated fluids in SSHE are highly viscous, fouling problems may occur and reduce significantly the thermal efficiency of SSHE. The presence of rotating blades in the annulus makes it possible to avoid the possible fouling problem on the heat exchanger surface, and improve the heat transfer treatment received by the product. A short discussion of the previous studies of authors who attempted to focus on the heat transfer and basic flow patterns in SSHE is presented here. Trommelan et al. [1] was the first person to describe the fluid