2023
DOI: 10.3390/fluids8020034
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A Generalized Diffusion Equation: Solutions and Anomalous Diffusion

Abstract: We investigate the solutions of a generalized diffusion-like equation by considering a spatial and time fractional derivative and the presence of non-local terms, which can be related to reaction or adsorption–desorption processes. We use the Green function approach to obtain solutions and evaluate the spreading of the system to show a rich class of behaviors. We also connect the results obtained with the anomalous diffusion processes.

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Cited by 5 publications
(4 citation statements)
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“…This idea first emerged at the end of the seventeenth century and has been developed in the area of mathematics throughout the eighteenth and nineteenth centuries. More recently, by the end of the twentieth century, it turned out that some physical phenomena can be modeled more accurately when fractional calculus is used [62][63][64][65][66][67][68][69][70][71][72][73][74]. A good review of various applications of fractional calculus in physics can be found in [62].…”
Section: Theory Of Heat Conduction Including the Non-equilibrium Rela...mentioning
confidence: 99%
See 1 more Smart Citation
“…This idea first emerged at the end of the seventeenth century and has been developed in the area of mathematics throughout the eighteenth and nineteenth centuries. More recently, by the end of the twentieth century, it turned out that some physical phenomena can be modeled more accurately when fractional calculus is used [62][63][64][65][66][67][68][69][70][71][72][73][74]. A good review of various applications of fractional calculus in physics can be found in [62].…”
Section: Theory Of Heat Conduction Including the Non-equilibrium Rela...mentioning
confidence: 99%
“…Based on Eqs.11-14, it can be seen that the entire problem is described by fractional linear integro-differential equations. Such equations, as well as integer linear integro-differential equations, can be solved using the Laplace transform [61,[68][69][70][71][72][73][74]78].…”
Section: Model Of Pa Signal Including Local Thermal Non-equilibrium I...mentioning
confidence: 99%
“…More recently, by the end of the twentieth century, it turned out that some physical phenomena are modeled more accurately when fractional calculus is used [81]. Typical examples of the use of fractal derivatives can be found in physics and mathematics [19][20][21][81][82][83][84][85], in bioengineering [86], in geophysics [87], in polymers physics [88], etc. Tateishi et al [80] recently described how the diffusion in complex systems can be accurately addressed with fractional time-derivative operator.…”
Section: Generalized Fractional Diffusion Theory Including Delayed Fluxmentioning
confidence: 99%
“…There has been a tremendous increase in the applications of fractional calculus as a new and efficient mathematical tool for analyzing the properties of non-linear materials and relating the parameters in the models to experimental results. Lenzi et al [3] studied the solutions of a generalized diffusion-like equation using a spatial and time-fractional derivative; in their equations, the presence of the non-local terms, related to reaction or adsorption-desorption processes, are also accounted for. They used the Green function approach to obtain solutions.…”
mentioning
confidence: 99%