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• CONTACThttps://enrichment.kaust.edu.sa/home/

​Abstract:

Viscoacoustic anisotropy: the wave equations and the eikonal equations.
Incorporating attenuation anisotropy into the acoustic anisotropic wave and eikonal equations provides a choice for acoustic forward and inverse modeling in attenuating anisotropic media. In this seminar, Qi will talk about the dynamics and kinematics of viscoacoustic anisotropic wave propagation. In the dynamic aspect, Qi will present a relatively general description of the scalar and vector viscoacoustic orthorhombic wave equations. From such a general description, Qi will show briefly the corresponding wave equations in differential form for few classic viscoacoustic models, such as the Kelvin-Voigt, Maxwell, standard-linear-solid and Kjartansson models. To investigate the effect of attenuation and attenuation anisotropy on waveforms in multiple viscoacoustic models, Qi will illustrate the asymptotic acoustic radiations from a point source. In the kinematic aspect, Qi will show briefly the attenuating orthorhombic eikonal equation as a consequence of the viscoacoustic orthorhombic wave equations. Qi will introduce in detail the acoustic attenuating VTI eikonal equation for transverse isotropy. Qi will present a fast sweeping technique to numerically solve the acoustic attenuating VTI eikonal equation. Viscoacoustic anisotropic imaging and tomography are the main applications of the proposed wave and eikonal equations.

Biography:

Qi Hao has worked on seismic anisotropy for over ten years. Before he joined KFUPM, he was a postdoc at the Department of Geosciences and Petroleum in Norwegian University of Science and Technology, where he was supervised by Dr. Alexey Stovas (NTNU) and Dr. Tariq Alkhalifah (KAUST) to study various research problems on seismic anisotropy. He has published 21 papers in peer-reviewed journals and presented over 20 expanded abstracts at international conferences such as EAGE, SEG, and IWSA. 

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• CONTACTSarah Salhi

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• CONTACTProf. Shuyu Sun

​Abstract: Ion transport is ubiquitous in aqueous environments in biological, geological, chemical and environmental systems. Electrokinetics plays a very important and key role in some special cases where pore size is comparable to the screening length of electrical double layer. The applications include tight oil/gas exploration and development, radiative waste disposal, high-quality water purification, and even ion channels in cells. This talk will present (1) electrokinetic and interface theories for ion transport in micro/nanoporous media; (2) a mesoscopic numerical framework for predictions and the validations by comparisons with theories and experimental data; (3) multiscale analysis in both spacial and temporal scales for special applications.

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• CONTACTProf. Shuyu Sun

​Abstract:  

Air pollution is recognized today as a major health risk. Exposure to air pollution, both ambient and household, increases a person’s risk of contracting a disease, such as atherosclerosis, stroke, chronic bronchitis, diabetes or asthma. Cities are considered as hot spots and urban populations are particularly exposed. There is, therefore, an urgent need to prepare cities to improve air quality and to adapt to climate change, incorporating this knowledge into urban planning and future design. But, air pollution is not just a health risk but also a drag on development. By causing illness and premature death, air pollution reduces the quality of life. By causing a loss of productive labor, it also reduces incomes in these countries.

Bio:

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• CONTACTProf. Georgiy L. Stenchikov