05-29-2020, 08:54 PM
https://phys.org/news/2020-05-solution-c...ssion.html
A Bristol academic has achieved a milestone in statistical/mathematical physics by solving a 100-year-old physics problem—the discrete diffusion equation in finite space.
The long-sought-after solution could be used to accurately predict encounter and transmission probability between individuals in a closed environment, without the need for time-consuming computer simulations.
In his paper, published in Physical Review X, Dr. Luca Giuggioli from the Department of Engineering Mathematics at the University of Bristol describes how to analytically calculate the probability of occupation (in discrete time and discrete space) of a diffusing particle or entity in a confined space—something that until now was only possible computationally.
Dr. Giuggioli said: "The diffusion equation models random movement and is one of the fundamental equations of physics. The analytic solution of the diffusion equation in finite domains, when time and space is continuous, has been known for a long time.
Well, I'm not sure whether this was being worked on specifically due to COVID-19 - but, either way, it was very good timing !
I'm not sure how easy it'll be to apply this right away, but then, they have had a century to examine the question of "What would the implications be if this was true?"
A Bristol academic has achieved a milestone in statistical/mathematical physics by solving a 100-year-old physics problem—the discrete diffusion equation in finite space.
The long-sought-after solution could be used to accurately predict encounter and transmission probability between individuals in a closed environment, without the need for time-consuming computer simulations.
In his paper, published in Physical Review X, Dr. Luca Giuggioli from the Department of Engineering Mathematics at the University of Bristol describes how to analytically calculate the probability of occupation (in discrete time and discrete space) of a diffusing particle or entity in a confined space—something that until now was only possible computationally.
Dr. Giuggioli said: "The diffusion equation models random movement and is one of the fundamental equations of physics. The analytic solution of the diffusion equation in finite domains, when time and space is continuous, has been known for a long time.
Well, I'm not sure whether this was being worked on specifically due to COVID-19 - but, either way, it was very good timing !
I'm not sure how easy it'll be to apply this right away, but then, they have had a century to examine the question of "What would the implications be if this was true?"
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