Abstract This review article covers the topics of evaluation and experimental determination oxygen mass transfer coefficients ( k L a ) for their application in characterising bioreactors fermentations processes. The provides comparison different approaches determining bioreactors. Additionally, influence bioreactor design fermentation parameters on is discussed. aim to provide useful informati...

The two-dimensional problem of advection–dispersion associated with a non-aqueousphase liquid (NAPL) pool is addressed using the boundary element method. The problem is appropriately posed with an inhomogeneous boundary condition taking into consideration the presence of the pool and the impermeable layer. We derive a Fredholm integral equation of the first kind for the concentration gradient a...

Water transport through the gas diffusion layer (GDL) of a proton exchange membrane (PEM) fuel cell is of critical importance in the operation of the fuel cell. In this study, the transport of water vapor through the GDL is investigated. A one-dimensional, single-phase heat and mass transfer model is developed to investigate the diffusivity of water vapor through the GDL of a PEMFC. An experime...