Journal article
Mechanics of flow and mixing at antroduodenal junction
World journal of gastroenterology : WJG, Vol.13(9), pp.1365-1371
03/07/2007
DOI: 10.3748/wjg.v13.i9.1365
PMCID: PMC4146920
PMID: 17457967
Abstract
The morphology of tissue structures composing the pyloric orifice is thought to play a role in effectively mixing aqueous gastric effluent with duodenal secretions. To understand the physical mechanisms leading to efficient digestion requires computational models that allow for analyses of the contributions of individual structural components. Thus, we have simulated 2-D channel flows through representative models of the duodenum with moving boundary capabilities in order to quantitatively assess the importance of notable features. A well-tested flow solver was used to computationally isolate and compare geometric and kinematic parameters that lead to various characteristics of fluid motion at the antroduodenal junction. Scalar variance measurement was incorporated to quantify the mixing effectiveness of each component. It was found that the asymmetric geometry of the pyloric orifice in concert with intermittent gastric outflow and luminal constriction is likely to enhance homogenization of gastric effluent with duodenal secretions.
Details
- Title: Subtitle
- Mechanics of flow and mixing at antroduodenal junction
- Creators
- Seth Dillard - Department of Mechanical Engineering, University of Iowa, Iowa City, IA 52242, USASreedevi KrishnanH S Udaykumar
- Resource Type
- Journal article
- Publication Details
- World journal of gastroenterology : WJG, Vol.13(9), pp.1365-1371
- DOI
- 10.3748/wjg.v13.i9.1365
- PMID
- 17457967
- PMCID
- PMC4146920
- NLM abbreviation
- World J Gastroenterol
- ISSN
- 1007-9327
- eISSN
- 2219-2840
- Publisher
- United States
- Language
- English
- Date published
- 03/07/2007
- Academic Unit
- Roy J. Carver Department of Biomedical Engineering; Injury Prevention Research Center; Mechanical Engineering
- Record Identifier
- 9984064564902771
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