1. Countercurrent flow:
1. critical heat flux in, 2.7.3-26
2. gas-liquid, in vertical channels, 2.3.2-21 - 2.3.2-22
3. heat exchangers, 1.1.1-1
1. temperature pattern for in single-phase flow, 1.1.3-1
4. P-NTU chart for, 1.5.2-2