Amer is a lecturer in Engineering with interests in thermo-mechanical characteristics of deformable fluids and porous media applied to reducing the environmental impact of fossil fuel extraction and development of technologies for renewable energy.
He recieved a PhD from University of London in 2011 for his work on "Permeability and injectivity enhancement of the near wellbore region for CO2 enhanced coalbed methane recovery and CO2 storage " at Imperial College London.
After completing his PhD, he continued to be with Imperial College where he worked on various collaborative research projects, funded by Industry, UK and EU research councils, aimed at clean fossil fuel recovery and realisation of Carbon Capture and Storage as mature technology.
He joined the University of Aberdeen in 2014 as lecturer within the School of Engineering.
- Viscoelastic behaviour of non-Newtonian fluids
- Fracture mechanics
- Subcritical crack growth in rocks due to temperature gradients
- Adsorption in porous media
Main research themes:
Effect of viscoelasticity on dynamics of non-Newtonian fluids:
Non-Newtonian fluids are ubiquitous in nature from flow of lava, honey, paints to blood in the human body. These fluids differ from Newtonian fluids, such as water, as the viscosity of these fluids depends on applied deformation or the shear rate. Polymers are one of the most widely used engineering fluids that exhibit non-Newtonian behaviour of shear thinning i.e, the viscosity of the polymers decreases with the increase in shear rate. This theme investigates the effect of deformation (shear rate) on the loss and storage moduli of non-Newtonian fluids.
Mechanical behaviour of rock- non-Newtonian fluid system:
Most fluids flow through different media with relative ease without undergoing any deformation or exerting significant forces on the medium but, the transport of more viscous fluids (e.g., honey, paints, lava etc,) is complex in nature. These fluids, classified as non-Newtonian fluids, can undergo limited deformation affecting the nature of flow. For instance, human blood has certain viscosity under normal conditions but, in case of cancer or cardio-vascular diseases, the viscosity of the blood will be higher than normal. This increased viscosity of blood will result in additional stresses in the veins (wall shear stress). This is a gradual process and is often affected by the resistance the veins can offer. The current understanding of the effect of wall shear stress of the medium on the gradual change in viscosity is limited. Furthermore, as the viscosity of the fluid increases, it tends to behave more like an elastic solid, exhibiting viscoelasticity. This theme aims to quantify through detailed experimental studies, the interaction between the stresses in fluid in relation to the medium carrying it.
Subcritical crack growth in rocks: Effect of porothermoelasticity
Subcritical crack growth in rocks is characterised by slow propagation of cracks at stresses lower than those computed by linear elastic theory. The crack initiation and propagation also depends on the state of the rock including imperfections and the environment. These theme analyses the effect of temperature, porepressure and type of fluid on subcritical crack growth in rocks.
Acoustic wave propagation in viscoelastic materials: Identification of seismic boundaries
Attenuation and propagation of acoustic waves was observed when it propagates through a medium was observed to be proportional to its elastic modulus. The converse is widely applied in experimental mechanics wherein the elastic modulus of a medium is estimated by analysing the attenuated and propagated acoustic waves. Acoustic wave propagation has been a subject of interest to identify the porosity or the crack population in addition to the elastic modulus of rocks and cracked solids. Acoustic waves have also been used to characterise viscous flows, however the application has been limited to Newtonian fluids. This theme investigates the measurement of spatial distribution of viscosity in a porous medium by analysing attenuated acoustic spectrum.
Adsorption induced stress in materials:
Strain resulting from adsorption of fluids (eg. water vapour, methane) has been observed in case of porous glass, charcoal and shale. Previous work has indicated that this swelling induced strain and associated kinetics of adsorption depends on the affinity of the sorbent and solvent, the pore size distribution and temperature. Currents theme focuses on the role of adsorption kinetics on mechanics on mass transport in shale to evaluate the environmental impact of the exploration activities .
Supplied by TecQuipment. It can be operated at constant flow rate or constant head. The streamlines can be imaged for quantitative analysis of single or two phase laminar flow.
Test set up for idealised flow through porous media:
Designed and manufactured in-house. Glass beads owing to their regular and well defined size, when packed creates an excellent idealised porous medium, which can be used to demonstrate physical principles and to validate theoretical models related to single or multiphase flow through porous media.
Boyle's law manometric setup for gas adsorption studies:
Adsorption of fluids in some materials such as porous glass, activated carbon, coal and shale induces mechanical deformation of material. This deformation is related to the pore structure of the material and its affinity to the absorbing fluid.
Triaxial cell with insitu acoustic velocity measurements in rocks (Under development):
Attenuation and propagation of shear waves through rocks. (Kit donated by Imperial College of Science, Technology and Medicine, London)
Dhelda Mfanga (2015-2018). Geomechanical stability of rocks during drilling. Funded by EU-Tanzania capacity building grant. Co-supervised by Yukie Tanino, Dave Healy (School of Geosciences) and Anna Korre (Imperial College London).
The work is supported by
Principal's Interdisciplinary fund (2014)
Development Trust, University of Aberdeen (2014-2015)
- Dr Yukie Tanino, School of Engineering
- Professor Anna Korre, Imperial College London
- Dr Luca De Siena, School of Geosciences
- Further Info
Deputy Programme Coordinator of MSc Oil and Gas Engineeering programme
Disability coordinator, School of Engineering