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	Stefan-Maxwell-diffusion	Ficks lagar	Psykrometrisk analys
Ämnesområde	Termodynamik	Termodynamik	Termodynamik
Familj	Process / pipeline	Process / pipeline	Process / pipeline
Ursprungsår	1871	1855	1911
Upphovsperson	Josef Stefan and James Clerk Maxwell	Adolf Fick	R. E. Carrier
Typ	Diffusion equation	Diffusion law	Humid air thermodynamic analysis
Ursprungskälla	Reid, R. C., Prausnitz, J. M., & Poling, B. E. (1987). The Properties of Gases and Liquids (4th ed.). McGraw-Hill. ISBN: 978-0071247009	Fick, A. (1855). On liquid diffusion. Philosophical Magazine, 10(63), 30-39.	ASHRAE. (2021). Handbook-Fundamentals. American Society of Heating, Refrigerating and Air-Conditioning Engineers.
Alias	Stefan-Maxwell equation, multicomponent diffusion	diffusion equation, Fickian diffusion	psychrometrics, humid air analysis
Närliggande	3	3	3
Sammanfattning	The Stefan-Maxwell diffusion equation describes how multiple chemical species diffuse through each other in a mixture, accounting for interactions between all species pairs. Unlike Fick's law, which assumes species diffuse independently, Stefan-Maxwell theory captures the coupling that occurs when species with different diffusivities move at different rates. This is essential for analyzing gas separation, combustion, catalytic processes, and reactive distillation.	Fick's Laws describe how species diffuse through media due to concentration gradients. The First Law (steady-state) relates diffusion flux to concentration gradient, while the Second Law (transient) describes how concentration changes over time. These laws are fundamental to mass transfer analysis, applying to gases, liquids, and solids. Fick's Laws are analogous to Fourier's Law of heat conduction, replacing temperature with concentration.	Psychrometric analysis is the study of humid air (air-water vapor mixtures) and its properties. It is essential for designing and analyzing air conditioning, ventilation, and dehumidification systems. Psychrometric analysis relates dry-bulb temperature, wet-bulb temperature, dew point, relative humidity, and specific humidity through carefully constructed charts and correlations.