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A comparison between numerical value of pressure gradient and approximate value of pressure gradient at the midpoint of dilatation region for different values of yield stress taking n = 0.8, k = 1.2, ζ = 0.01, and δ2 = −0.2.
| τy | 0.05 | 0.1 | 0.4 | 0.8 | 1.2 | 1.6 | 2 | 2.4 |
|---|---|---|---|---|---|---|---|---|
| Numerical value of q(z) | 5.0954 | 5.2106 | 5.9001 | 6.8133 | 7.7185 | 8.6152 | 9.5037 | 10.3845 |
| Analytical value of q(z) | 5.0956 | 5.2116 | 5.9163 | 6.8799 | 7.8709 | 8.8892 | 9.9349 | 11.008 |
