In this article we will discuss about the meaning and process of mass transfer. Meaning of Mass Transfer: When a system contains two or more components whose concentrations vary from point to point, there is a natural tendency for mass to be transferred, minimising the concentration differences within the system. The transport of one constituent from a region of higher [...]
In this article we will discuss about the Fick’s law of diffusion. Consider a chamber in which two different gas species, B and C, at the same temperature and pressure are initially separated by a partition. The left compartment has a high concentration of gas B (dark circles) whereas the right compartment is rich in gas C (white circles). Higher [...]
Consider evaporation of water contained in a tube or tank and its subsequent diffusion through the stagnant layer of air over it. Assumptions: (i) The system is under steady state and isothermal conditions (ii) The total pressure within the tube is constant and equal to the outside pressure (iii) Both air and water vapours behave as perfect gases (iv) Air [...]
In this article we will discuss about the general equation for mass transfer. Also learn about equimolal diffusion. General Equation of Mass Diffusion: Consider mass balance of species B diffusing through a control volume (dx × dy × dz) in a solid or stationary fluid medium C. Accumulation of mass of species B in the elemental volume due to its [...]
In this article we will discuss about the general equation for mass transfer. Also learn about equimolal diffusion. General Equation of Mass Diffusion: Consider mass balance of species B diffusing through a control volume (dx × dy × dz) in a solid or stationary fluid medium C. Accumulation of mass of species B in the elemental volume due to its [...]