Numerical Investigation and Simulation of Blood Flow from Venous Valves
Publish place: The 31st annual conference between Iran Mechanical Engineering and the 9th Iran Power Plant Industry Conference
Publish Year: 1402
نوع سند: مقاله کنفرانسی
زبان: English
View: 168
This Paper With 6 Page And PDF Format Ready To Download
- Certificate
- من نویسنده این مقاله هستم
استخراج به نرم افزارهای پژوهشی:
شناسه ملی سند علمی:
ISME31_295
تاریخ نمایه سازی: 10 خرداد 1402
Abstract:
Veins inside the human body return blood from differentbody organs to the heart. at lower body parts, veinsinclude valves known as venous valves whose duty is toprevent the reverse flow of blood inside the vein. Anyabnormalities among the leaflets of these valves causevenous valve insufficiency and in the long-term varicoseveins in the legs. Hemodynamical and mechanicalproperties of the blood flow and vein wall play animportant role in causing such complications such thatstudying them is necessary to identify possible spots forthrombus or clot formation. In the present study, twodimensionalnumerical models of the geometry includingpopliteal vein, venous valve and blood flow are simulatedand investigated using the finite element method.Governing equations consist of continuity, Navier-stokesequations, non-Newtonian blood model, structure motionequation and fluid-solid interaction equations. Resultsinclude blood flow velocity and pressure fields, andstress and strain on the elastic tissue with respect to valveinsufficiency. Numerical results indicate that the reverseflow (reflux) duration increases with the gap width. itexceeds half of the period for the valves with the gapexceeding ۵% of its diameter and is classified as strongreflux. Defined correlation between the blood flowpatterns and the valve geometry can contribute tounderstanding the details of the venous valve mechanicsand developing new techniques for surgical correction ofits insufficiency.
Keywords:
Authors
Hamidreza Toloueinasab
Department of Mechanical Engineering, University of Tabriz, Tabriz;
Seyed Esmail Razavi
Department of Mechanical Engineering, University of Tabriz, Tabriz;