페이퍼 제목 Espresso Coffee Brewing Dynamics: Development of Mathematical and Computational Models or Dynamics of Fluid Percolation Through a Bed of Particles Subject to Physico-Chemical Evolution, and Its Mathematical Modeling 
저자 M. PETRACCO, F. SUGGI LIVERANI 
발행연도 1993 
초록 SUMMARY

Preparing an espresso coffee cup is a common act of apparent simplicity, hiding a lot of complex phenomena, which use to lead to unexplainable variations in the cup’s aspect and appeal.

It may be scientifically defined as “Fluid Percolation through a Bed of Particles Subject to Physico-chemical Evolution”. An attempt is made to interpret experimental data, setting out differential equations of the classic hydrodynamics and showing how an insight into the coffee grounds is needed to explain the outfit’s behaviour.

Difficulties in trying to resolve in exact way complicated differential equations systems may be overcome by numerical solution, thanks to modern computers. A newer trend in computer science is called “naïve physics”, where neither the solutions nor the equations themselves are obtained by classical deduction.

Instead, local rules of behaviour are defined into a computer program and a graphical simulation of the phenomena is obtained step by step. 


Espresso Coffee Brewing Dynamics: 

Development of Mathematical and Computational Models or Dynamics of Fluid Percolation Through a Bed of Particles Subject to Physico-Chemical Evolution, and Its Mathematical Modeling


에스프레소의 기본적인 추출 역학을 컴퓨터 모델링으로 해석하기 위한 물리, 화학적 기본 추출 등에 대한 내용이 기술되어 있습니다. 추출 현상을 모델링 하기 위해 대표적인 illy 의 투명 챔버 실험에 대한 내용도 포함이 되어 있으며 이 밖에도 압력, 온도에 따른 추출 흐름, 미분의 이동(Fine Migration) 등에 대한 내용들이 실험되고 분석되었습니다. 


SUMMARY

Preparing an espresso coffee cup is a common act of apparent simplicity, hiding a lot of complex phenomena, which use to lead to unexplainable variations in the cup’s aspect and appeal.


It may be scientifically defined as “Fluid Percolation through a Bed of Particles Subject to Physico-chemical Evolution”. An attempt is made to interpret experimental data, setting out differential equations of the classic hydrodynamics and showing how an insight into the coffee grounds is needed to explain the outfit’s behaviour. 


Difficulties in trying to resolve in exact way complicated differential equations systems may be overcome by numerical solution, thanks to modern computers. A newer trend in computer science is called “naïve physics”, where neither the solutions nor the equations themselves are obtained by classical deduction.


Instead, local rules of behaviour are defined into a computer program and a graphical simulation of the phenomena is obtained step by step. 


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