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M-1 Molecular Diffusion in fluids - Coggle Diagram
M-1 Molecular Diffusion in fluids
Concentration , velocity, flux
mass fravtion of A
taotal molar concentratin C
Molar fraction
MAss averager velocity for a multicomponent mixture mass densitues
molar average velocity for a multicomponent
mass/molar flux
Mixture average velocity
molar diffusion flux
Relation b/w mass flux ni and mass diffusion flus Ji
molar flux Ni --- molar diffusion flux Ji
Molar flux Ni
Ficks first law of diffusion
Diffusion coefficient for binary ideal gas sysytems.
Diffusivity of liquids-
euation of continuity and ficks 2nd law
Multicomponent diffusitvity and derivation
Molecular diffusion in gases
Steady state diffusion of A through nondiffusing B
Staedy state equimolar counterdiffusion-
molercular diffusion liquids
Staeady state diffusion of A through nondiffusing B
steady state equimolar counterdiffusion
Diffusion in solids
Steady state diffusion in solids
diffusion through crystalline solids
diffusion in porous solids
Knudsen number
Knudse diffusion in porous solids.
Graham law of effusion for knudsen diffusion of a multicomponent system at constant total pressure.
unsteady -state diffusion
Diffuion from a slab with sealed edges
Diffusion from a rectangle bar with sealed ends
Diffusion fro a rectangular parllelepiped
Diffusion from a spher
Diffusion from a cylinder with sealed ends
Diffusion from a cylinder
convective mass transfer
Mass transfer coefficents
Equimolar counterdiffusion
for gases
For liquids
Relation b/w mass transfr coefficients.
Theories of mass transfer
Flim theory
The film theory is based on the following assumptions;.
Mass transfer at fluid surfaces.
penetration theory
surface -renewal theories
combination flim -surface renewal theory
surface stretch theory
interphase Mass transfer
equilibria
diffusion b/w phases
local two-phase Mass transfer
Local overall mass transfer coefficients
local coefficeint general case-
for the two important special caes-
diffusion of one component
equimolar counter diffusion
generalizied relation b/w K-type of mass tranfer coeffficeients
Analogics among molecular transport phenomena
Dimensionless groups of heat and mass transfer
The limation for converting replacing the group are