# Introduction to Transport Properties (ITP)

Transport Phenomena refers to the study of the motion and balance of momentum, heat, and mass in engineering problems. These three modes of transport are studied concurrently for several reasons: they have similar molecular origins, they yield similar governing equations/principles, they often occur simultaneously, and they require similar mathematical/conceptual tools.

In this section we define and introduce several conceptual tools necessary for studying transport, and answer several pertinent engineering questions:

What are my options in visualizing/conceptualizing the movement of momentum, heat, mass?

• Discuss the relationship between Thermodynamics and Transport Processes
• Summarize the critical aspects of continuum mechanics
• Explain the continuum hypothesis and the origin of its breakdown [Ch 1.1, 1.2]
• Define and give examples of (fluid) property fields [Ch 1.3]
• Differentiate between an Eulerian and Lagrangian description
• Explain the difference between an Eulerian and Lagrangian viewpoints [Ch 3.2]
• Identify and differentiate between streaklines, streamlines, and pathlines [Ch 3.3, 3.4]
• Mathematically derive streaklines, streamlines, and pathlines from an Eulerian velocity field
• Define systems and control volumes and identify when each is a useful frame of reference [Ch 3.5]

By what underlying mechanisms does this transport take place? [Ch 3.1]

• Explain and give examples of the three primary modes of heat transfer [Ch 15.1-15.4]
• Describe the primary modes of mass transfer [Ch 24.1-24.3]
• Identify the underlying forces and conceptual hurdles in momentum transport
• Name and explain the origin of forces acting on fluids in a control volume [Ch 2.1-2.4]
• Define laminar, turbulent, and transition flow regimes [Ch 12.1]
• Distinguish between external and internal flows
• Explain the meaning of fully-developed flow and calculate the entrance region length necessary for a pipe flow

What global understanding of the problem can be acheived through simple reasoning?

• Apply dimensional analysis to generalize problem descriptions
• Perform simple dimensional analysis, using the Buckingham Pi method [Ch 11.1-11.4]
• Calculate the Reynolds Number and use it to predict flow regimes