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Digestion of meat proteins in a human-stomach: A CFD simulation study
Publikationstyp
Journal Article
Date Issued
2023-01
Sprache
English
Author(s)
Jin, Yan
Institut
Volume
83
Article Number
103252
Citation
Innovative Food Science and Emerging Technologies 83: 103252 (2023-01)
Publisher DOI
Scopus ID
Understanding gastric digestion mechanisms is important for the design of functional foods. In this study, we have investigated the meat-protein digestion in human-stomach by using a CFD method. The gastric motility is modeled with a dynamic mesh. The disintegration of large food particles in an acidic environment is simulated using a reaction-diffusion-convection model. A food matrix is used to model the large food-particles. The numerical results show that the digestion and emptying become faster when the meat is treated at a higher temperature. The digestion rate is reduced considerably when the gastric motility or the H+ secretion is weakened due to a stomach disorder. TACs stimulate backflows which enhance the transport of enzymes and H+, thereby accelerating the digestion process. Due to the flow resistance by the food matrix made of large food particles, liquid gastric contents are emptied in a pathway close to the stomach inner-surface. Large food-particles are mainly disintegrated in the region next to the stomach inner-surface. Therefore, the characteristic length scale of species transport (for enzymes or H+) should be the size of food matrix, instead of the size of large food-particles.
Subjects
CFD
Chemical reaction
Gastric digestion
Gastric motility
Human stomach