Ongoing Research Projects

Nanoparticles Influence on Hemodynamic Transportation in Coronary Arteries Based on Patient-Specific Data

This ongoing research focuses on simulating the transport and dispersion of nanoparticles within the human arterial system to enhance targeted drug delivery for cardiovascular diseases. Using computational fluid dynamics (CFD), the project explores the hemodynamic behavior of blood–particle interaction under different physiological conditions.

Thermal Enhancement of Phase Change Materials (PCM) Heat Sink Using Novel Fin Designs

This research focuses on improving the thermal performance of phase change materials (PCMs) in passive heat sink systems. Building upon previous findings in the field, the study aims to validate and extend the work of Ji et al. (2017, Applied Thermal Engineering) by exploring new fin configurations that enhance natural convection and reduce melting time non-uniformities. A series of transient CFD simulations have been conducted using novel fin geometries to accelerate heat absorption and achieve more uniform temperature distributions within the PCM domain.

Hydrothermal and Entropic Evaluation of Helical Tube Heat Exchangers Using SiO₂-ZnO/Water Hybrid Nanofluids

In this work, the objective was to enhance heat transfer, control pressure drop, and assess entropy generation in a helical tube heat exchanger. A novel filleted-hexagonal profile was used with SiO₂-ZnO/water hybrid nanofluids at 1%, 2%, 3%, and 4% volume concentrations. Simulations were conducted under steady-state conditions using ANSYS Fluent across Dean numbers 4100–6834.

The results indicated that:

Nusselt number increased with nanoparticle concentration, with a 14.46% rise for 4% nanofluid over water.
Pressure drop rose significantly (up to 73%) with higher concentrations and Dean numbers.
Outlet temperature decreased with increased nanoparticle loading, indicating enhanced heat extraction.
Entropy generation was lowest (11%) for 4% SiO₂-ZnO, suggesting improved thermodynamic performance.

Velocity contours at outlet, (a) Water, (b) 1% SiO2-ZnO/Water, (c) 2% SiO2-ZnO/Water, (d) 3% SiO2-ZnO/Water, (e) 4% SiO2-ZnO/Water

Turbulence Kinetic Energy contours at outlet, (a) Water, (b) 1% SiO2-ZnO/Water, (c) 2% SiO2-ZnO/Water, (d) 3% SiO2-ZnO/Water, (e) 4% SiO2-ZnO/Water.

Output: Accepted at the 14th International Conference on Mechanical Engineering (ICME2023), BUET [Link]

Undergraduate Thesis

Title: Coronary Artery Bypass Graft Hemodynamics: Analysing Blood Flow in Partially Stenosed Arteries with Complete Bypass Graft.

Supervisor: Asst. Prof. Mr. Md. Arif Mahmud Shuklo Shoshe.

Timeline: 1 Year (December 2023- December 2024)

Synopsis: This research focuses on analyzing blood flow behavior in partially stenosed coronary arteries with complete bypass grafts using both ideal and realistic artery models. Numerical simulations were carried out in ANSYS Fluent under steady, transient, and pulsatile flow conditions. Both Newtonian and non-Newtonian blood flow models were considered to evaluate key parameters such as pressure distribution, velocity profiles, and wall shear stress. The study aims to contribute to the optimization of graft design and placement for improved post-operative outcomes in coronary artery bypass surgeries.

Realistic arterial model with bypass graft used in simulation

Maximum Wall Shear Stress (WSS)

Velocity Streamlines

Variation in Blood Pressure Drop

Variation in Blood Velocity

Highlights

Tested three CABG models under steady and pulsatile flow.
Model 2 showed optimal pressure, velocity, and WSS balance.
Model 1 had low WSS (plaque risk); Model 3 had high WSS (damage risk).
Non-Newtonian flow gave more realistic results.
Model 2 recommended for best graft performance.

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