a written in cylindrical co-ordinates are listed in Table 2.2. To model flow processes in complex process equipment, it may be necessary to use a more general co-ordinate system. It is possible to transform the equations listed in Table 2.2 into any such suitable co-ordinate systems. Anderson et al. (1984) listed governing equations applicable to any orthogonal curvilinear co-ordinates.

TABLE 2.2 Governing Equations in Cylindrical Co-ordinates d (p,) i d i d d

+ _ (p rU,) + - — (p V,) + - (p W,) d t r d r r de d z i d ( d, \ i d ( r,di \ d ( d, \

i (continuity) U (r momentum)

0 0

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