************************** **Film Evaporation Model** ************************** :: Film Evaporation Model = {model_name} ----------------------- **Description / Usage** ----------------------- This card takes the specification of the evaporation rate for the film-flow equation capability, specifically the shell_filmp equation. This function specifies the rate of evaporation in the unit of length per time. Currently two models for {model_name} are permissible: +--------------------------+-------------------------------------------------------------------------------------+ |**CONSTANT** |This model specifies a constant evaporation rate. This option requires one floating | | |point values | | | | | | * is the evaporation rate in the unit of length/time | +--------------------------+-------------------------------------------------------------------------------------+ |**CONC_POWER** |This model specifies evaporation rate function of particles volume fraction and the | | |input parameters (floats). This model is proposed by Schwartz et al (2001). The | | |functional form is: | | | | | | * is the pure liquid evaporation rate in units of length per time | | | * is exponent v and it should satisfy 0 <ν <1 | | | * is the maximum packing volume fraction 0max | +--------------------------+-------------------------------------------------------------------------------------+ .. figure:: /figures/494_goma_physics.png :align: center :width: 90% ------------ **Examples** ------------ Following is a sample card: :: Film Evaporation Model = CONC_POWER 1.0e-3 0.5 0.64 This results in film evaporation with the pure liquid evaporation rate of 1.0e-3, exponent of 0.5, and maximum packing volume fraction of 0.64. -------------- **References** -------------- Leonard W. Schwartz, R. Valery Roy, Richard R. Eley, and Stanislaw Petrash, “Dewetting Patterns in a Drying Liquid Film”, Journal of Colloid and Interface Science 234, 363–374 (2001)