Heat Transfer II

COURSE CONTENT

Introduction. Heat convection phenomenology. Newton law of cooling. Pi theorem. Dimensional analysis. Nondimensional Numbers. Forced convection. Free convection.

Working correlations for forced convection.

Working correlations for free convection.

Conjugate heat transfer.

Heat exchangers. Overall heat transfer coefficient. Types of heat exchangers. Mean temperature difference. Number of Transfer Units method.

Analysis of heat convection. Mass, momentum, and energy conservation equations. Dimensional analysis. Boundary layer. Differential and integral equations of the boundary layer. Turbulence. Laminar forced convection past plane surfaces. Turbulent boundary layers. Reynolds, Prandtl and von-Karman analogies. Heat convection in fully developed pipe flow. Reynolds, Prandtl and von-Karman analogies. Free convection heat transfer. Free convection past vertical plane surfaces.

LEARNING OUTCOMES

Knowledge:

• the basic concepts and mechanisms in heat convection,
• significance of non-dimensionalization and dimensionless numbers,
• distinguishing forced and free convection,
• turbulent flow effects on heat convection
• heat exchangers – principle, types, modes of operation, performance
• Heat Transfer Balances
• mass, momentum and energy conservation equations
• Experimental heat transfer – instrumentation, techniques, analysis and data reduction of experimental results
• Open Issues in Heat convection
• Heat convection and efficient energy utilization

Skills:

• analysis of heat convection problems
• approximating complex heat transfer problems with appropriate assumptions
• laboratory work on heat transfer – experimental devices, instrumentation and procedures
• efficient use of heat transfer bibliography

Abilities:

• Solving heat convection problems in practical applications
• quantitative analysis of heat exchangers
• solving conservation equations in simple heat convection problems
• experimental investigation of heat transfer problems.