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Such curvatures and holes are effective preferred sinks for material diffusion on the top of a surface [42, 43].
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We suggest the new method for solving multi-material diffusion problems on such meshes and compare its performance with known homogenization methods.
While different issues can be debated in that respect, thermal diffusion of water vapour in porous materials – diffusion driven by temperature gradients – currently stands out, due to the contradictory findings on the topic.
Put the diffusion material on the four sides of the box.
These models were employed to evaluate the influence of the geometry and of the material properties on the diffusion of water in a representative composite joint.
Our work is in the spirit of some recent methods (D. Adalsteinsson, J. Sethian, Transport and diffusion of material quantities on propagating interfaces via level set methods, Journal of Computational Physics 185(1) (2003) 271 288; J.-J.
A significant dependence of the GB self-diffusion on the material purity was observed, resulting in a different Arrhenius behaviour of the diffusivity δDGB where δ is the GB width and DGB is the GB diffusion coefficient.
However, to the best of our knowledge, the effect of material properties on the anode diffusion polarization and its effect on the exergy and energy efficiency have not been presented in the open literature.
The pore size distribution in this material corresponds to mesoporous; then, the gas diffusion through a porous material depends on the pore size, and this can be described by Knudsen diffusion [43]: Fig. 7 Sensor response to 100 (a) and 200 (b) ppm of CO gas operated at 266 °C and 100 kHz {D}_k=frac{4 r}{3}sqrt{frac{2 RT}{pi M}} (9).
Strong intermolecular interactions would cause the release of dexamethasone from the PLLA/dex fibers to be more dependent on the rate of material degradation than on free diffusion, whereas the absence of these strong interactions may explain the severe burst release of dexamethasone observed from the PCL/dex fibers.
The method is then applied to simulate the well-known HTO diffusion test and to derive the effective diffusion coefficient of the heterogeneous material based on Fick's law.
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