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G-type shells in shell-and-tube heat exchangers: Gaddis, E S, Galerkin method, for heat conduction finite-element calculations, Galileo number, Gas-liquid flows: Gas-liquid-solid interfaces, fouling at, Gas-solid interfaces, fouling at, Gas tungsten arc welding, Gaseous fuels, properties of, Gases: Gaskets: Gauss-Seidel method, for solution of implicit equations, Geometric optics models for radiative heat transfer from surfaces, geothermal brines, fouling of heat exchangers by, Germany, Federal Republic of, mechanical design of heat exchangers in: Gersten, K, Girth flanges, in shell-and-tube heat exchangers, Glass production, furnaces and kilns for, Glycerol (glycerine): Gn (heat generation number), Gnielinski, V Gnielinski correlation, for heat transfer in tube banks, Gomez-Thodas method, for vapour pressure, Goodness factor, as a basis for comparison of plate fin heat exchanger surfaces, Goody narrow band model for gas radiation properties, Gorenflo correlation, for nucleate boiling, Gowenlock, R, Graetz number: Granular products, moving, heat transfer to, Graphite, density of, Grashof number Gravitational acceleration, effect in pool boiling, Gravity conveyor: Gregorig effect in enhancement of condensation, Grid baffles: Grid selection, for finite difference method, Griffin, J M, Groeneveld correlation for postdryout heat transfer, Groeneveld and Delorme correlation for postdryout heat transfer, Gross plastic deformation Group contribution parameters tables, Guerrieri and Talty correlations for forced convective heat transfer in two-phase flow, Gungor and Winterton correlation, for forced convective boiling, Gylys, J,
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Longitudinal Flow in Tube Bundles with Grid Baffles

DOI 10.1615/hedhme.a.000258

3.3 SHELL-AND-TUBE HEAT EXCHANGER
3.3.12 Longitudinal Flow in Tube Bundles with Grid Baffles

A. Characteristics of longitudinal flow

There are two fundamental modes of flow on the outside of tube bundles:

  1. crossflow, perpendicular to the tubes;
  2. longitudinal flow, parallel to the axis of the tubes.

Flow in shell-and-tube heat exchangers with cross baffles will have generally some components of both flow types. With segmental baffles crossflow is predominant but with multi-segmental baffles, longitudinal flow is a major component. A different type of baffle is discussed here, termed the “grid” or “rod” baffle, with which the shell operates essentially in longitudinal flow, interrupted only by a grid of rods or strips which support the tubes against sagging.

The main characteristics of longitudinal flow in tube bundles are summarized here as follows:

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