Ahmad Baroutaji

Materials in PEM Fuel Cells

Tremendous efforts have been made in the last few decades to develop new energy sources that can replace the conventional power sources which relay on fossil resources. Among the different alternative power sources, the Proton Exchange Membrane Fuel Cell (PEMFC) is considered one of the most promising alternative clean power generators, since it offer the possibility of zero-emission by converting the chemical energy stored in hydrogen fuel directly into electricity with water as the only by-product.

Computational Fluid Dynamic simulation and modelling (CFX) of flow plate in PEM fuel cell using aluminum open cellular foam material

This paper reports the design and development of a Proton Exchange Membrane (PEM) fuel cell using Aluminum open pore cellular metal foam as the flow plate material. Effective housing designs are proposed for both hydrogen and oxygen sides and through the application of Computational Fluid Dynamic (CFD) modelling and analysis techniques, the flow regime through the open pore cellular metal foam flow plate are identified. Based on the CFD results, the best anode housing design was selected. The fuel cell was then modelled and the findings are reported. The results obtained showed that using the open pore cellular foam material for the modelled fuel cell was more efficient compared to the traditional types of fuel cell in literature.

Analysis of the Effect of the Elliptical Ratio in Tubular Energy Absorbers Under Quasi-Static Conditions

Tubular systems are proposed to use as energy absorber because they are cheap and they are easy to manufacture; recently some researchers use elliptical tubes as energy absorbers. In this work, the influence of elliptical ratio on energy absorption capability and load carrying capacity and stresses of mild steel elliptical tubes has been investigated both experimentally and numerically. The experimental analysis was conducted by using a Zwick Type BT1-FB050TN testing machine. In addition to the experimental work, a computational analysis using ANSYS is made to predict the loading and response of such tubes where series of models were performed with elliptical ratios ranging from 0.5–1.5. Comparison of experimental and numerical force- and energy-displacement responses are presented.

Mechanics and Computational Modeling of Pharmaceutical Tabletting Process

Tabletting is a cheap, but complicated, manufacturing process which is widely used in the pharma sector to produce pharmaceutical tablets as the most common form of solid dosage. The tabletting process is associated with many complex phenomena that may lead to undesirable tablet defects. Successful tabletting is very challenging and requires a sound knowledge of the powder behavior during compaction.

Metallic Thin-Walled Tubes for Crashworthiness Applications: A Reference Guide

Over the past several decades, thin-walled (TW) metallic tubes have been widely used in energy absorbing structures to alleviate the detrimental effects of an impact loading and enhance the crashworthiness performance of a vehicle. In this article, based on a broad survey of the literature, a comprehensive overview of the recent developments in the area of crashworthiness performance of TW tubes is given with a special focus on the topics that emerged in the last 10 years such as crashworthiness optimization design and energy absorbing responses of unconventional TW components including multicells tubes, and functionally graded thickness tubes. Due to the huge number of studies that analyzed and assessed the energy absorption behavior of various TW components, this article presents only a review of the crashworthiness behavior of metallic hollow structures under various loading conditions.

Transparent Conductive Oxides Thin Films for Radio Frequency Attenuation

A great interest has arisen in technologies that use radio frequency. Not limited to the sensitive electrical devices, radio frequency is the key for all applications that employ transmission of information. This has brought different kinds of fear on what effects these frequencies could have on human beings. Radio frequency shielding is employed where there is a need for that whether as a precaution or a requirement. In this article, transparent conductive oxides (TCOs) in the form of thin films are reviewed as a type of material known to have the best combination between good conductivity and optical transparency. The physical properties of TCOs were thoroughly discussed to address a good understanding for the radio frequency attenuation process.