Magnetic resonance imaging is often used as a source for reconstructing vascular anatomy for the purpose of computational fluid dynamics (CFD) analysis. We recently observed large discrepancies in such "image-based" CFD models of the normal common carotid artery (CCA) derived fr…
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This research advances the knowledge of the working principles of the Shock-wave Induced Spraying Process (SISP), a thermal spray material deposition technique. Pulses created by a fast acting valve pass through a heated line increasing energy content and interacting with metere…
Unfavorable thermal comfort conditions are common in the non-conditioned apartment buildings typical of Dhaka (Ali, 2007; Hafiz, 2004). Causes behind such unfavorable thermal comfort conditions include (but are not limited to) Dhaka's climate, microclimate in Dhaka's typical res…
Ozone (O3), a highly reactive gas, is the major component of photochemical smog and causes a reproducible heterogeneous pattern of lung injury. We hypothesize that this spatial distribution of lung injury mirrors an analogous distribution of O3 dose delivered to different tissue…
Torpedo-shaped anchors serve as foundations for risers and floating structures in the deep-water marine environment. Such cone-tipped, cylindrical steel pipes, ballasted with concrete and scrap metal, penetrate the seabed by the kinetic energy they acquire during free fall. Esti…
The problem of incompressible axisymmetric flow over spheroidal bodies is considered. The analysis covers steady and unsteady flows of inviscid and viscous fluids. The spheroidal bodies may take the shape of spheres, oblate or prolate spheroids. The study is based on analytical …
Wind energy is the mainstream source of clean and renewable energy and it is also the fastest-growing source of sustainable energy in the world. In the Global Wind Energy Council's report in 2014, wind industry grew 44% worldwide. In order to optimize the efficiency of wind farm…
The seeding of a porous scaffold with stem cells is a fundamental step in engineering sizeable tissue constructs that are clinically viable. However, a key problem often encountered is inhomogeneous seeding of the cells particularly when the cells are delivered through the thick…
The hydrodynamics of density currents are difficult to study in the natural environment, whereas laboratory experiments are limited to small-scale flows, are time-consuming and are not necessarily easier when it comes to measuring flow properties or establishing relationships be…
Recent advances in many fields have made the design of micro-aerial vehicles that implement flapping wings a possibility. However, there are many outstanding problems that must be solved before flapping flight can be implemented as a practical means of propulsion. This dissertat…
A numerical/computational model and the associated FORTRAN computer code have been developed to simulate chemical vapor deposition processes. The computation of the deposition rate on the wafer surface is very sensitive to the number of control volumes inside the boundary layer.…
Risk assessments of potentially toxic inhaled particulate matter (PM 10, PM2.5, etc.) and delivery of aerosolized medication (antibiotics, bronchodilators, etc.) are based upon predictions of particle deposition in the respiratory tract. Usually, these predictions are for the en…
This dissertation describes computational fluid dynamics (CFD) simulations of gas-solid flow in a riser and gas-liquid-solid flow in a slurry bubble column reactor. Three computer codes were used. The commercial code, Fluent, was used to simulate the dilute flow of 530 μm in the…
Logan's Turbomachinery: Flowpath Design and Performance Fundamentals, Third Edition is the long-awaited revision of this classic textbook, thoroughly updated by Dr. Bijay Sultanian. While the basic concepts remain constant, turbomachinery design has advanced since the Second Edi…