Biofluid Mechanics
Upper-airway airflow, obstructive sleep apnea, pseudoaneurysm treatment, ureteral stents, thrombosis modeling and patient-specific medical-twin workflows.
Academic Research Portfolio
Md. Didarul Islam
Ph.D. Student and Doctoral Researcher in CFD, Biofluids and Turbomachinery
I develop computational, experimental and data-driven methods for biomedical and engineering flow systems. My current work focuses on upper-airway medical twins, obstructive sleep apnea, pseudoaneurysm treatment, ureteral-stent flow and rim-driven pump and propeller systems at the Flow Information Lab, Gyeongsang National University.
Academic and Professional Milestones
Recent Milestones
Selected academic and professional milestones are shown first; earlier milestones remain available in the archive.
- Jul 2026Selected as a member of Group 7 — K-ResearChain in the KIRD Global R&D Career Salon in Korea.
- Jul 2026Delivered the keynote lecture “CFD–PIV Analysis and Performance Optimization of Hubless Rim-Driven Systems” at ISROMAC19, Waseda University, Japan.
- Jun 2026Published “Experimental Investigation of Ultrasound-Guided Thrombin Injection Outcomes in Complex Morphologies of Iatrogenic Femoral Artery Pseudoaneurysms” in the Journal of Thrombosis and Haemostasis.
- May 2026Received the Young Pioneer Researcher Award from Gyeongsang National University.
- Apr 2026Received Miyan Publications Rewards 2026 from IUBAT, Bangladesh.
- Feb 2026Published “Koopman theory-based reduced-order modeling for diagnosing obstructive sleep apnea using breathing power diagram” in Physics of Fluids.
- Sep 2025Started the Ph.D. program in Mechanical and Aerospace Engineering at Gyeongsang National University and continued as a Doctoral Researcher at the Flow Information Lab.
View detailed milestones archive, 2020–2025
- Aug 2025Completed the M.Sc. in Mechanical Engineering at Gyeongsang National University, South Korea, with a CGPA of 4.21/4.50.
- Aug 2025Published “Experimental and CFD analysis of flow impediments and encrustation in ureteral stents using in vitro urinary tract model” in Scientific Reports.
- Aug 2025Received the Best Presentation Award at the 5th IAHR Asian Working Group Symposium on Hydraulic Machinery and Systems, South Korea.
- Aug 2025Presented “Back-Turn Method for Energy Optimization in Booster Pump Systems” at the 5th IAHR Asian Working Group Symposium on Hydraulic Machinery and Systems, South Korea.
- Apr 2025Published “Numerical Simulation of Solid–Liquid Two-Phase Flow Analysis of Submersible Drainage Pumps” in Irrigation and Drainage.
- Mar 2025Received the Miyan Publications Rewards 2025 from IUBAT, Bangladesh, in recognition of research publication achievements.
- Jan 2025Presented “Effects of Cavitation and Erosion on the Hydraulic Performances of Submersible Drainage Pumps” at the 4th Asian Workshop on Hydraulic Machinery, Japan.
- Dec 2024Published “Optimized impeller hydraulic performance of submersible drainage pumps: An experimental study” in Physics of Fluids.
- Nov 2024Presented “Flow Performance and Encrustation Analysis of Ureteral Stents Using an In Vitro Urinary System” at the Korean Society of Mechanical Engineers Winter Conference, South Korea.
- Sep 2024Published “A new approach to evaluate obstructive sleep apnea according to body mass index using breathing diagram” in Physics of Fluids.
- Aug 2024Presented “Percutaneous Thrombin Injection Outcomes in Femoral Artery Pseudoaneurysms Using Complex Pseudoaneurysm Models” at ICTAM 2024, South Korea.
- Aug 2024Presented “Analysis of Encrustation Formation in Four Types of Ureteral Stents Using an In Vitro Urinary Model” at ICTAM 2024, South Korea.
- Mar 2024Presented “Analysis of Encrustation Formation at a Double J Stent with a Controlled Flow Rate Using an In Vitro Bladder Model” at the Biomedical Engineering Society for Circulatory Disorders Summer Conference, South Korea.
- Feb 2024Received the Miyan Publications Rewards 2024 from IUBAT, Bangladesh, in recognition of research publication achievements.
- Nov 2023Presented “A Study on Renovated Double J Stent for Urine Drainage Performance” at the Korean Society of Mechanical Engineers Annual Meeting, South Korea.
- Sep 2023Started the M.Sc. program in Mechanical Engineering at Gyeongsang National University and joined the Flow Information Lab as a Graduate Research Assistant.
- Jan 2022Promoted to Senior Lecturer in the Department of Mechanical Engineering at IUBAT, Bangladesh.
- Jan 2020Joined IUBAT as a Lecturer in the Department of Mechanical Engineering.
Research Focus
Connecting flow physics, experiments, and data-driven models
My research combines high-fidelity CFD, in-vitro validation, PIV-based flow measurement and reduced-order modeling to make complex flow systems more interpretable and useful for engineering and clinical decisions.
Turbomachinery and Propulsion
Rim-driven pumps and propellers, drainage and booster pumps, duct and blade optimization, cavitation, erosion, hydraulic performance and CFD–PIV validation.
Data-Driven Flow Modeling
Koopman theory, dynamic mode decomposition, CNN-based autoencoders, and reduced-order models for faster prediction, diagnosis, and engineering design exploration.
Selected Work
Featured Publications
A curated selection representing my main research directions. The complete chronological list is available below.
Koopman ROMOSA · Biofluids
Koopman theory-based reduced-order modeling for diagnosing obstructive sleep apnea using breathing power diagram
Introduces a Koopman-theory-based reduced-order modeling workflow for faster prediction of OSA-related breathing-power characteristics.
Stent CFDCFD · Experiment
Experimental and CFD analysis of flow impediments and encrustation in ureteral stents using in vitro urinary tract model
Combines in-vitro testing and CFD to examine flow obstruction and encrustation behavior in ureteral stents.
Thrombin ModelPseudoaneurysm · Biofluids
Thrombin-induced thrombosis models for ultrasound-guided thrombin injection of femoral artery pseudoaneurysms
Develops biofluid and thrombosis models to support safer ultrasound-guided thrombin injection strategies.
Breathing DiagramOSA · CFD
A new approach to evaluate obstructive sleep apnea according to body mass index using breathing diagram
Presents a breathing-diagram-based CFD framework for interpreting OSA-related airflow behavior across BMI groups.
CavitationDrainage Pump
Cavitation and erosion effects on hydraulic performances of a submersible drainage pump
Investigates how cavitation and erosion alter hydraulic performance and operational stability in submersible drainage pumps.
Rim-Driven SystemsPropulsion · Pump
Numerical Approach to Performance Analysis of Modified Duct Shapes for Electric Hubless Rim-Driven Propellers
Evaluates duct-shape modifications for improved hydrodynamic performance of electric hubless rim-driven propellers.
View complete publication list
2026
Numerical Approach to Performance Analysis of Modified Duct Shapes for Electric Hubless Rim-Driven Propellers.
Islam, M. D., Lee, C. J., & Kim, H. H. · Journal of Mechanical Science and Technology · Accepted.
Numerical Study on the Blade Shape Optimization of a Rim-Driven Pump for High-Rise Firefighting Drones.
Jeong, J. M., Lee, C. J., Islam, M. D., & Kim, H. H. · Journal of Mechanical Science and Technology · Accepted.
Design Optimization of a Double Volute Centrifugal Pump: A Numerical Study.
Zhang Junhui, Rakibuzzaman, M., Islam, M. D., Zhou, L., & Kim, H. H. · Irrigation and Drainage · Accepted.
Experimental Investigation of Ultra-Guided Thrombin Injection Outcomes in Complex Morphologies of Iatrogenic Femoral Artery Pseudoaneurysms.
Choi, Y. H., Cho, S., Tae, S. J., Kang, H. J., Islam, M. D., et al. · Journal of Thrombosis and Haemostasis. DOI
Koopman theory-based reduced-order modeling for diagnosing obstructive sleep apnea using breathing power diagram.
Kang, H.*, Islam, M. D.*, Choi, Y. H., Kim, H. H., & Koo, B. · Physics of Fluids, 38(2), 021917. DOI
2025
Thrombin-induced thrombosis models for ultrasound-guided thrombin injection of femoral artery pseudoaneurysms.
Kang, H. J.*, Islam, M. D.*, Choi, Y. H., Lee, Y. K., Song, M. J., & Kim, H. H. · Physics of Fluids, 37(8). DOI
Experimental and CFD analysis of flow impediments and encrustation in ureteral stents using in vitro urinary tract model.
Islam, M. D., Kang, H. J., Tae, S. J., et al. · Scientific Reports, 15(1), 22034. DOI
Back-turn Approach for Optimal Operation of Booster Pump Systems.
Bae, Y. S., Islam, M. D., Choi, Y. D., Kang, H. J., Tae, S. J., & Kim, H. H. · Journal of Applied Fluid Mechanics, 18(9), 2202–2211. DOI
Additive Manufacturing in Bone Science: A Cutting-Edge Review of Its Potential and Progress.
Chowdhury, M. S., Oliullah, M. S., Hossen, M. Z., et al., & Islam, M. D. · Medicine in Novel Technology and Devices, 100379. DOI
Numerical Simulation of Solid–Liquid Two-Phase Flow Analysis of Submersible Drainage Pumps.
Rakibuzzaman, M., Islam, M. D., Kim, H. H., Suh, S. H., Zhou, L., & Iqbal, A. P. · Irrigation and Drainage. DOI
Synthesis and applications of natural fiber-reinforced epoxy composites: A comprehensive review.
Mahmud, M. Z. A., Rabbi, S. F., Islam, M. D., & Hossain, N. · SPE Polymers, 6(1), e10161. DOI
Cavitation and erosion effects on hydraulic performances of a submersible drainage pump.
Rakibuzzaman, M., Suh, S. H., Kim, H. H., Islam, M. D., Zhou, L., & El-Emam, M. A. · Alexandria Engineering Journal, 113, 431–450. DOI
2024
Optimized impeller hydraulic performance of submersible drainage pumps: An experimental study.
Rakibuzzaman, M., Kim, H. H., Islam, M. D., Suh, S. H., Zhou, L., & Roshid, M. H. O. · Physics of Fluids, 36(12). DOI
A new approach to evaluate obstructive sleep apnea according to body mass index using breathing diagram.
Islam, M. D., Kim, J. S., Jeon, S. J., et al. · Physics of Fluids, 36(9), 091903. DOI
Effects of cavitation and erosion on submersible drainage pumps: A numerical study.
Rakibuzzaman, M., Kim, H. H., Suh, S. H., Islam, M. D., & Zhou, L. · Physics of Fluids, 36(8). DOI
Evaluation of renovated double J stents using ureter models with and without stenosis.
Choi, Y. H., Kang, H. J., Kim, K. W., et al., Islam, M. D., et al. · World Journal of Urology, 42(1), 228. DOI
2023
The Development of Eco-Friendly Biopolymers for Use in Tissue Engineering and Drug Delivery.
Mahmud, M. Z. A., Islam, M. D., & Mobarak, M. H. · Journal of Nanomaterials, 2023(1), 9270064. DOI
Analysis of epoxy composites reinforced with jute, banana, and coconut fibers and enhanced with Rubik's layer.
Al Mahmud, M. Z., Islam, M. D., & Rabbi, S. F. · Journal of the Mechanical Behavior of Biomedical Materials, 147, 106151. DOI
Works in progress
Efficiency Optimization of a Double Volute Centrifugal Pump based on Response Surface and Computational Fluid Dynamics.
Zhang Junhui, Rakibuzzaman, M., Zhou, L., Islam, M. D., & Kim, H. H. · Manuscript in preparation.
Conference Activity
Domestic and International Presentations
Oral presentations, international sessions, workshops, and a keynote lecture delivered from 2023 to 2026.
International Conferences and Workshops
5 presentations- 2026
- 2025
- 2025
- 2024
- 2024
Domestic Conferences and Int. Sessions
5 presentations-
2026
OSA Diagnostic Index Prediction Using CFD and CNN-KAEDomestic Oral PresentationConference site ↗
- 2025
- 2024
- 2024
-
2023
A Study on Renovated Double J Stent for Urine Drainage PerformanceInternational SessionConference site ↗
Current and Recent Work
Selected Research Projects
Projects that represent my current research direction and collaborative experience.
3D Upper Airway Medical Twin for Non-invasive OSA Diagnosis
CFD-based upper-airway modeling, patient-specific breathing analysis, and reduced-order prediction using Koopman and CNN-based methods.
Global Aerospace Digital Composites Pioneering Research
Research support at the intersection of computational engineering, aerospace systems, digital analysis, and advanced composite applications.
Rim-Driven Pump Equipped Firefighting Drone
Hydraulic performance analysis and shape optimization of rim-driven pumping systems for high-rise firefighting applications.
CFD Analysis for Small-Hydropower By-Pass Piping
Computational assessment of internal flow behavior and hydraulic performance for small-hydropower by-pass piping systems.
Optimal Thrombin Injection for Femoral Artery Pseudoaneurysm
In-vitro and computational investigation of injection location, thrombosis behavior, treatment success, and embolism risk.
Double J Ureteral Stent Improvement Study
Experimental and CFD evaluation of urine drainage, flow obstruction, stenosis effects, and encrustation behavior in ureteral stents.
Academic Background
Education, Experience, Skills, and Honors
Selected background information is shown here; the complete record is available in the downloadable CV.
Education
- Ph.D. in Mechanical and Aerospace Engineering
- M.Sc. in Mechanical Engineering
- M.Sc. Coursework in Mechanical Engineering
- B.Sc. in Mechanical Engineering
Experience
- Doctoral Researcher
- Graduate Research Assistant
- Senior Lecturer
- Lecturer
- Assistant Engineer, Mechanical
Research Skills
CFDANSYS CFX, ICEM CFD, SpaceClaim, Workbench
ExperimentalPIV, in-vitro flow testing, model validation
Programming and DataPython, MATLAB, R, Minitab
Reduced-Order ModelingDMD, Koopman methods, CNN autoencoders
CADNX, SolidWorks, AutoCAD, SpaceClaim
Scientific CommunicationLaTeX, Overleaf, technical figures and diagrams
Selected Honors
- Young Pioneer Researcher Award
Gyeongsang National University - Miyan Publications Rewards
IUBAT, Bangladesh - Best Presentation Award
IAHR-Asia 2025 - Young Pioneer Researcher Award
Gyeongsang National University - GNU Fellowship
Gyeongsang National University
Contact
Research collaboration and academic communication
Flow Information Lab
Department of Mechanical and Aerospace Engineering
Gyeongsang National University, Jinju-si, South Korea