Thermodynamics and the hydromechanics boundary condition are given.
给定了合理的热力学及流体力学边界条件。
In this paper the mechanical behaviour of the fluid at the exit of a slit die has been analysed theoretically based on the basic law of hydromechanics.
本文从流体力学的基本定律出发，从理论上分析了流体在狭缝出口处的力学行为。
Based on hydromechanics affinity theory and major control factor of highway tunnel ventilation, the paper had made certain highway tunnel ventilation boundary condition.
