| Boolean | toggleStaggered | | true = staggered grid type; false = in-line |
| SI.Length | d_o | | Outer diameter of tubes |
| SI.Length | D_i | | Inside shell diameter |
| SI.Length | DB | | Tube bundle diameter |
| SI.Length | s1 | | Tube to tube pitch parallel to baffel edge |
| SI.Length | s2 | | Tube to tube pitch perpindicular to baffel edge |
| SI.Length | S | | Baffle spacing between baffles |
| SI.Length | S_E | | Baffle spacing between the heat exchanger sheets and adjacent baffles |
| SI.Length | e1 | | Space between tubes and shell |
| Real | nes | | # of shortest connections connecting neighboring tubes |
| Real | n_MR | | # of main resistances in cross flow path |
| Real | n_MRE | | # of main resistances in end cross flow path |
| Real | n_s | | # of pairs of sealing strips |
| SI.DynamicViscosity | mu | | Upstream dynamic viscosity |
| SI.DynamicViscosity | mu_w | | Dynamic viscosity of fluid at average wall temperature |
| SI.MassFlowRate | m_flow | | Mass flow rate |