Soq

Equating eqns. (4.2) and (4.4) and simplifying, dan vdar dr dr

don dor

dr dr

Substituting for (an — crr) from eqn. (4.1), dar r. don dar r—^ + pr2u>2 (1 + v) + r—^ - vr—- = 0 dr 1 dr dr

Integrating, daH dar 2

where 2A is a convenient constant of integration. Subtracting eqn. (4.1), dar pr2 co2 2a r + r~ = —(3 + v) + 2A dr 2

dar d r ■> ^ 1 But 2ar + r-— = — (r2ar) x -

dr dr r dr

2 2 prAco

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