Mathematical Model of Multiphase Flow in Multiple Media at Different Scales

2020 ◽  
pp. 71-95
Author(s):  
Qiquan Ran
Keyword(s):  
Mathematical Model ◽  
Multiphase Flow ◽  
Multiple Media

scholarly journals A Multiphase Flow in the Antroduodenal Portion of the Gastrointestinal Tract: A Mathematical Model

2016 ◽  
Vol 2016 ◽  
pp. 1-18 ◽  
Author(s):  
P. V. Trusov ◽  
N. V. Zaitseva ◽  
M. R. Kamaltdinov
Keyword(s):  
Mathematical Model ◽  
Gastrointestinal Tract ◽  
Multiphase Flow ◽  
Human Body ◽  
Digestive System ◽  
System Model ◽  
Food Density ◽  
Secretory Function ◽  
Functional Disorders ◽  
Food Particles

A group of authors has developed a multilevel mathematical model that focuses on functional disorders in a human body associated with various chemical, physical, social, and other factors. At this point, the researchers have come up with structure, basic definitions and concepts of a mathematical model at the “macrolevel” that allow describing processes in a human body as a whole. Currently we are working at the “mesolevel” of organs and systems. Due to complexity of the tasks, this paper deals with only one meso-fragment of a digestive system model. It describes some aspects related to modeling multiphase flow in the antroduodenal portion of the gastrointestinal tract. Biochemical reactions, dissolution of food particles, and motor, secretory, and absorbing functions of the tract are taken into consideration. The paper outlines some results concerning influence of secretory function disorders on food dissolution rate and tract contents acidity. The effect which food density has on inflow of food masses from a stomach to a bowel is analyzed. We assume that the future development of the model will include digestive enzymes and related reactions of lipolysis, proteolysis, and carbohydrates breakdown.

Mathematical model for coal conversion in supercritical water: reacting multiphase flow with conjugate heat transfer

2019 ◽  
Vol 44 (30) ◽  
pp. 15746-15757 ◽  
Author(s):  
Zhisong Ou ◽  
Hui Jin ◽  
Zhenhua Ren ◽  
Shixing Zhu ◽  
Mengmeng Song ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Mathematical Model ◽  
Multiphase Flow ◽  
Supercritical Water ◽  
Conjugate Heat Transfer ◽  
Coal Conversion
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