Combined convection opposing flow

FIGURE 9A Assisting and opposing combined convective flow. 

To illustrate the form of results obtained, consider assisting and opposing combined convective flow over a square cylinder at low Reynolds numbers (Fig. 9.13). A computer program, MIXSQCYL, that finds this solution can be obtained in the way discussed in the Preface. The program assumes that the flow over the cylinder is symmetrical about the vertical center-line of the cylinder. 

When determining heat transfer under combined natural and forced convection conditions, it is tempting to add the contributions of natural and forced convection in assisting flows and to subtract them in opposing flows. However, the evidence indicates differently. A review of experimental data suggests a conelation of the form... 

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