A multiphase flow in the antroduodenum: some results of the mathematical modelling and computational simulation
This work is devoted to a problem of creation of a multiphase flow model in an antroduodenum that includes the lower part of the stomach and the upper part of the small intestine (duodenum). The mathematical model is developed for the next purposes: description of the process of digestion in normal...
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2018-01-01
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Series: | MATEC Web of Conferences |
Online Access: | https://doi.org/10.1051/matecconf/201814504002 |
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doaj-bbe9235ad72d4f5a951567b26d9414932021-02-02T01:55:24ZengEDP SciencesMATEC Web of Conferences2261-236X2018-01-011450400210.1051/matecconf/201814504002matecconf_nctam2018_04002A multiphase flow in the antroduodenum: some results of the mathematical modelling and computational simulationKamaltdinov MaratTrusov PeterZaitseva NinaThis work is devoted to a problem of creation of a multiphase flow model in an antroduodenum that includes the lower part of the stomach and the upper part of the small intestine (duodenum). The mathematical model is developed for the next purposes: description of the process of digestion in normal physiological state and with functional disorders, prediction of the flow characteristics in distinct conditions. The antroduodenum is considered as a complex form canal with moving boundaries. The mathematical statement of the problem includes mass and momentum conservation equations for phases and components as well as initial and boundary conditions with peristaltic movement. To describe secretion and absorption processes we use mass sources/sinks in a layer adjacent to the tract wall. Using computational simulation we got the digestion processes characteristics in dynamic: pH of the medium, components and phases velocities and fractions. In some scenarios with secretory and motor disorders we identified zones of abnormal acidity. The results of the simulation showed that motor functionality of the antrum and pyloric sphincter affect the stomach evacuation. Additionally, the chemical absorption rate is analyzed in scenarios with distinct food parameters (size, viscosity, density).https://doi.org/10.1051/matecconf/201814504002 |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Kamaltdinov Marat Trusov Peter Zaitseva Nina |
spellingShingle |
Kamaltdinov Marat Trusov Peter Zaitseva Nina A multiphase flow in the antroduodenum: some results of the mathematical modelling and computational simulation MATEC Web of Conferences |
author_facet |
Kamaltdinov Marat Trusov Peter Zaitseva Nina |
author_sort |
Kamaltdinov Marat |
title |
A multiphase flow in the antroduodenum: some results of the mathematical modelling and computational simulation |
title_short |
A multiphase flow in the antroduodenum: some results of the mathematical modelling and computational simulation |
title_full |
A multiphase flow in the antroduodenum: some results of the mathematical modelling and computational simulation |
title_fullStr |
A multiphase flow in the antroduodenum: some results of the mathematical modelling and computational simulation |
title_full_unstemmed |
A multiphase flow in the antroduodenum: some results of the mathematical modelling and computational simulation |
title_sort |
multiphase flow in the antroduodenum: some results of the mathematical modelling and computational simulation |
publisher |
EDP Sciences |
series |
MATEC Web of Conferences |
issn |
2261-236X |
publishDate |
2018-01-01 |
description |
This work is devoted to a problem of creation of a multiphase flow model in an antroduodenum that includes the lower part of the stomach and the upper part of the small intestine (duodenum). The mathematical model is developed for the next purposes: description of the process of digestion in normal physiological state and with functional disorders, prediction of the flow characteristics in distinct conditions. The antroduodenum is considered as a complex form canal with moving boundaries. The mathematical statement of the problem includes mass and momentum conservation equations for phases and components as well as initial and boundary conditions with peristaltic movement. To describe secretion and absorption processes we use mass sources/sinks in a layer adjacent to the tract wall. Using computational simulation we got the digestion processes characteristics in dynamic: pH of the medium, components and phases velocities and fractions. In some scenarios with secretory and motor disorders we identified zones of abnormal acidity. The results of the simulation showed that motor functionality of the antrum and pyloric sphincter affect the stomach evacuation. Additionally, the chemical absorption rate is analyzed in scenarios with distinct food parameters (size, viscosity, density). |
url |
https://doi.org/10.1051/matecconf/201814504002 |
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