Spread and evaporation of liquid

Pool spreading and vaporization of liquid hydrogen

“…Such equations, however, were according to their nature strongly case-dependent. A more physical approach is given in mechanistic models, where the pool is assumed to be of cylindrical shape with initial conditions for height and diameter, and where the conservation equations for mass and energy are applied e.g., [5,6]. Gravitation is the driving force for the spreading of the pool transforming all potential energy into kinetic energy.…”

High-order perturbation solutions to a LH2 spreading model with continuous spill

“…A second driving force for pool spread may be the inbalance between the surface tension forces at the liquid/air/ ground or water interface. The net surface tension force usually tends to assist pool spread; and, although it is usually smaller than the initial gravity force, it does not decrease as the pool spreads and will eventually become dominant [7].…”

“…There is another model based on shallow layer equations [2e7] under the assumption of axisymmetry, to solve the velocity and pool height with respect to radius and time. The simplest mathematical model, which can be called the simple physical model [7] describes the pool spread in terms of how the pool radius and height evolve in time. The corresponding equations consist of two ordinary differential equations with respect to time and one algebraic equation.…”

Pool spreading and vaporization of liquid hydrogen

“…Such equations, however, were according to their nature strongly case-dependent. A more generic approach is given in mechanistic models, where the pool is assumed to be of cylindrical shape with initial conditions for height and diameter, and where the conservation equations for mass and energy are applied [e.g., [17,18]]. Gravitation is the driving force for the spreading of the pool transforming all potential energy into kinetic energy.…”