EVALUATION OF THE VESSEL WITH DIFFERENT STENOSIS STRUCTURES USING CFD APPROACH

Arif Çutay; Özdeş Çermik; Ahmet Kaya

doi:10.17780/ksujes.1544608

TR EN

FARKLI DARLIK YAPILARINA SAHİP DAMARIN HAD YAKLAŞIMI KULLANILARAK DEĞERLENDİRİLMESİ

Öz

Kan damarlarındaki stenoz, yaygın bir kardiyovasküler sorundur ve sayısal simülasyon, deneysel çalışmalara karşı erişilebilir bir alternatif sunar. Bu çalışma, hesaplamalı akışkanlar dinamiği (HAD) kullanarak farklı boyutlara ve viskozite modellerine sahip stenozlu damarlardaki kan akış dinamiklerini simüle etmektedir ve bu, kanın farklı koşullar altında nasıl davrandığına dair önemli bilgiler sağlamaktadır. Stenoz sonrası bölgedeki deneysel verilerle yapılan karşılaştırmalar sonucunda doğrulama, kabul edilebilir farklılıklar göstermektedir. Stenoz uzunluğu (13.75 mm'den 27.5 mm'ye) ve yüksekliği (2.2 mm'den 4.4 mm'ye) değiştirilerek dokuz farklı stenoz modeli analiz edilmiş ve üç viskozite modeli (Newtonian, Power Law, Carreau Yasası) test edilmiştir. Temel değişkenler olan duvar kayma gerilimi (WSS), basınç düşüşü ve maksimum boğaz hızı belirlendi ve resirkülasyon bölgeleri ile akım çizgileri konturları gözlemlendi. Sonuçlar, stenoz boyutlarındaki küçük değişikliklerin akış dinamiklerini önemli ölçüde etkilediğini göstermektedir. Newtonian ve Power Law modelleri benzer sonuçlar üretirken, farklı viskozite modelleri akış sonuçlarını değiştirmektedir. Carreau Law Modeli, maksimum WSS değerlerini 25 Pa ile 125 Pa arasında gösterirken, Newtonian ve Power Law modelleri aynı koşullar altında 1.5 ile 10 Pa arasında değerler göstermektedir.

Anahtar Kelimeler

EVALUATION OF THE VESSEL WITH DIFFERENT STENOSIS STRUCTURES USING CFD APPROACH

Abstract

Stenosis of blood vessels is a common cardiovascular issue, and numerical simulation provides an accessible alternative to experimental studies. This study utilizes computational fluid dynamics (CFD) to simulate blood flow dynamics in stenotic vessels with varying dimensions and viscosity models, offering insights into how blood behaves under different conditions. Validation, conducted by comparing results with experimental data in the post-stenotic region, shows acceptable differences. Nine stenosis models were analyzed by altering stenosis length (from 13.75 mm to 27.5 mm) and height (from 2.2 mm to 4.4 mm) while testing three viscosity models: Newtonian, Power Law, and Carreau Law. Key variables such as wall shear stress (WSS), pressure drop, and maximum throat velocity were determined, and recirculation zones and streamline contours were observed. The results indicate that small changes in stenosis dimensions significantly impact flow dynamics. While Newtonian and Power Law models produce similar outcomes, different viscosity models alter flow results. Carreau Law shows maximum WSS values between 25 Pa and 125 Pa, compared to 1.5 to 10 Pa for the Newtonian and Power Law models under the same conditions.

Keywords

References

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Details

Primary Language

English

Subjects

Mechanical Engineering (Other)

Journal Section

Research Article

Authors

Arif Çutay ^*
0000-0002-0057-9417
Türkiye

Özdeş Çermik
0000-0001-9308-4589
Türkiye

Ahmet Kaya
0000-0001-9197-3542
Türkiye

Publication Date

March 3, 2025

Submission Date

September 6, 2024

Acceptance Date

October 7, 2024

Published in Issue

Year 2025 Volume: 28 Number: 1

DOI

https://doi.org/10.17780/ksujes.1544608

IZ

https://izlik.org/JA92WL47MN

Cite

RIS / Bibtex

APA

Çutay, A., Çermik, Ö., & Kaya, A. (2025). EVALUATION OF THE VESSEL WITH DIFFERENT STENOSIS STRUCTURES USING CFD APPROACH. Kahramanmaraş Sütçü İmam Üniversitesi Mühendislik Bilimleri Dergisi, 28(1), 245-257. https://doi.org/10.17780/ksujes.1544608

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