研究了具阀门梯度的平面径向流动引起的一类自由边值问题。
The authors consider a free boundary problem arised from the radical flow of plane Non Newtonian fluids with yield stress.
考虑了二次梯度项影响的非线性径向流动问题的无限大地层和有界地层渗流模型。
The models of the nonlinear radial flow for the infinite and finite reservoirs including a quadratic gradient term were presented.
高速流动的油井，由于在井底附近地带存在湍流的影响，达西定律的平面径向流动已不完全适用。
Since turbulence effect appears near wellbore in oil well with high-speed flow, Darcy's Law for flat radial flow is incompletely applicable.
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