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Transport Phenomena in Electrokinetically Generated Microflows
, Ph.D. Dissertation Sharif University of Technology ; Saeedi, Mohammad Hassan (Supervisor) ; Mozaffari, Ali Asghar (Supervisor) ; Chakraborty, Suman (Co-Advisor)
Abstract
This is a theoretical study on heat and mass transfer in electrokinetically driven microfluidic devices with particular consideration to the lab-on-a-chip (LOC) applications. Special attention is given to disclose the effects of the fluid rheology and the aspect ratio of the rectangular geometry on the surface reaction kinetics and the temperature rise due to the Joule heating. Along this line, two different viscoelastic constitutive equations namely PTT and FENE-P models along with the power-law viscosity model are being considered. The secondary aims also include exploring the influences of the fluid properties variations throughout the channel cross section on the hydrodynamic and thermal...
Numerical modeling of surface reaction kinetics in electrokinetically actuated microfluidic devices
, Article Analytica Chimica Acta ; Vol. 838, issue , August , 2014 , pp. 64-75 ; ISSN: 00032670 ; Amini, Y ; Saidi, M. H ; Chakraborty, S ; Sharif University of Technology
2014
Abstract
We outline a comprehensive numerical procedure for modeling of species transport and surface reaction kinetics in electrokinetically actuated microfluidic devices of rectangular cross section. Our results confirm the findings of previous simplified approaches that a concentration wave is created for sufficiently long microreactors. An analytical solution, developed for the wave propagation speed, shows that, when normalizing with the fluid mean velocity, it becomes a function of three parameters comprising the channel aspect ratio, the relative adsorption capacity, and the kinetic equilibrium constant. Our studies also reveal that the reactor geometry idealized as a slit, instead of a...
Temperature rise in electroosmotic flow of typical non-newtonian biofluids through rectangular microchannels
, Article Journal of Heat Transfer ; Volume 136, Issue 3 , March , 2014 ; ISSN: 00221481 ; Sadeghi, A ; Saidi, M. H ; Chakraborty, S ; Sharif University of Technology
2014
Abstract
Electroosmosis is the main mechanism for flow generation in lab-on-a-chip (LOC) devices. The temperature rise due to the Joule heating phenomenon, associated with the electroosmosis, may be detrimental for samples being considered in LOCs. Hence, a complete understanding of the heat transfer physics associated with the electroosmotic flow is of high importance in design and active control of LOCs. The objective of the present study is to estimate the temperature rise and the thermal entry length in electroosmotic flow through rectangular microchannels, having potential applications in LOC devices. Along this line, the power-law rheological model is used to account for non-Newtonian behavior...
Combined influences of viscous dissipation, non-uniform Joule heating and variable thermophysical properties on convective heat transfer in microtubes
, Article International Journal of Heat and Mass Transfer ; Volume 55, Issue 4 , January , 2012 , Pages 762-772 ; 00179310 (ISSN) ; Sadeghi, A ; Saidi, M. H ; Chakraborty, S ; Sharif University of Technology
2012
Abstract
This study presents a comprehensive investigation on hydrodynamic and thermal transport properties of mixed electroosmotically and pressure driven flow in microtubes. Particular emphasis is given to investigating the combined consequences of viscous dissipation, non-uniform Joule heating, and variable thermophysical properties. Analytical solutions are obtained using the Debye-Hückel linearization and constant fluid properties assumption, while a numerical solution is presented for variable fluid properties and non-uniform distribution of Joule heating. The results indicate that, viscous heating effect is pronounced significantly when a favorable pressure gradient exists and cannot be...
Graetz problem extended to mixed electroosmotically and pressure-driven flow
, Article Journal of Thermophysics and Heat Transfer ; Volume 26, Issue 1 , 2012 , Pages 123-133 ; 08878722 (ISSN) ; Veisi, H ; Saidi, M. H ; Chakraborty, S ; Sharif University of Technology
2012
Abstract
Thermally developing mixed electroosmotically and pressure-driven flow in a parallel plate microchannel with a step change in wall temperature is considered in the framework of an extended Graetz problem. Both Joule heating and viscous dissipation effects are taken into consideration. Expressions for the dimensionless temperature and Nusselt number in the form of infinite series are presented. In general, the associated eigenvalue problem is solved numerically. Nevertheless, an analytical solution is also presented for axial locations close to the entrance. Comparisons are made between the present results and those obtained by approximating the electroosmotic velocity with the...
Mixed electroosmotically and pressure-driven flow with temperature- dependent properties
, Article Journal of Thermophysics and Heat Transfer ; Volume 25, Issue 3 , Sep , 2011 , Pages 432-442 ; 08878722 (ISSN) ; Yavari, H ; Saidi, M. H ; Chakraborty, S ; Sharif University of Technology
2011
Abstract
The present work reports the outcome of a comprehensive parametric study on mixed electroosmotically and pressure-driven flow in slit microchannels with constant wall heat fluxes. Special attention is given to disclose the applicability ranges of usual assumptions in simplified analyses. The governing equations for fully developed conditions are first made dimensionless and then solved by means of an implicit finite difference method. The results reveal that the assumption of constant thermophysical properties does not leadto significant errors in practical applications. Although the Debye-Huckel linearization may successfully be used to evaluate velocity profiles up to the zeta potentials...
Variational formulation on Joule heating in combined electroosmotic and pressure driven microflows
, Article International Journal of Heat and Mass Transfer ; Volume 61, Issue 1 , June , 2013 , Pages 254-265 ; 00179310 (ISSN) ; Saidi, M. H ; Waezi, Z ; Chakraborty, S ; Sharif University of Technology
2013
Abstract
The present study attempts to analyze the extended Graetz problem in combined electroosmotic and pressure driven flows in rectangular microchannels, by employing a variational formulation. Both the Joule heating and axial conduction effects are taken into consideration. Since assuming a uniform inlet temperature profile is not consistent with the existence of these effects, a step change in wall temperature is considered to represent physically conceivable thermal entrance conditions. The method of analysis considered here is primarily analytical, in which series solutions are presented for the electrical potential, velocity, and temperature. For general treatment of the eigenvalue problem...
Analytical solutions for thermo-fluidic transport in electroosmotic flow through rough microtubes
, Article International Journal of Heat and Mass Transfer ; Volume 92 , 2016 , Pages 244-251 ; 00179310 (ISSN) ; Sadeghi, A ; Saidi, M. H ; Chakraborty, S ; Sharif University of Technology
Elsevier Ltd
2016
Abstract
The limitations of the microfabrication technology do not allow producing perfectly smooth microchannels. Hence, exploring the influences of roughness on transport phenomena in microtubes is of great importance to the scientific community. In the present work, consideration is given toward the corrugated roughness effects on fully developed electroosmotic flow and heat transfer in circular microtubes. Analytical solutions based on perturbation technique are presented for the problem assuming a low zeta potential under the constant heat flux boundary condition of the first kind. It is revealed that higher values of the corrugation number and relative roughness give rise to smaller Nusselt...
Low swirl premixed methane-air flame dynamics under acoustic excitations
, Article Physics of Fluids ; Volume 31, Issue 9 , 2019 ; 10706631 (ISSN) ; Farshchi, M ; Chakravarthy, S. R ; Chakraborty, A ; Aravind, I. B ; Wang, B ; Sharif University of Technology
American Institute of Physics Inc
2019
Abstract
In this study, simultaneous particle image velocimetry and planar laser induced fluorescence of hydroxyl radical, chemiluminescence imaging, and hot-wire measurements are utilized to study reacting low swirl flow dynamics under low to high amplitude acoustic excitations. Results show that a temporal weak recirculation zone exists downstream of the flame, which is enlarged in size under acoustic excitations. Investigations show that temporal behaviors of this recirculation zone play a significant role in flame movements and instabilities. As the acoustic wave amplitude increases, the flame lift-off distance changes drastically, resulting in flame instabilities (flashback and blowout) during...
Global, regional, and national burden of hepatitis B, 1990–2019: a systematic analysis for the Global Burden of Disease Study 2019
, Article The Lancet Gastroenterology and Hepatology ; Volume 7, Issue 9 , 2022 , Pages 796-829 ; 24681253 (ISSN) ; Hiebert, L ; Han, H ; Ippolito, H ; Abbasi-Kangevari, M ; Abbasi-Kangevari, Z ; Abbastabar, H ; Abdoli, A ; Abubaker Ali, H ; Adane, M. M ; Adegboye, O. A ; Adnani, Q. E. S ; Advani, S. M ; Afzal, M. S ; Afzal, S ; Aghaie Meybodi, M ; Ahadinezhad, B ; Ahinkorah, B. O ; Ahmad, S ; Ahmad, T ; Ahmadi, S ; Ahmed, H ; Ahmed, M. B ; Rashid, T. A ; Akalu, G. T ; Aklilu, A ; Akram, T ; Al Hamad, H ; Alahdab, F ; Alem, A ; Alem, D. T ; Alhalaiqa, F. A. N ; Alhassan, R. K ; Ali, L ; Ali, M. A ; Alimohamadi, Y ; Alipour, V ; Alkhayyat, M ; Almustanyir, S ; Al-Raddadi, R. M ; Altawalah, H ; Amini, S ; Amu, H ; Ancuceanu, R ; Andrei, C. L ; Andrei, T ; Anoushiravani, A ; Ansar, A ; Anyasodor, A. E ; Arabloo, J ; Arab-Zozani, M ; Argaw, A. M ; Argaw, Z. G ; Arshad, M ; Artamonov, A. A ; Ashraf, T ; Atlaw, D ; Ausloos, F ; Ausloos, M ; Azadnajafabad, S ; Azangou-Khyavy, M ; Azari Jafari, A ; Azarian, G ; Bagheri, S ; Bahadory, S ; Baig, A. A ; Banach, M ; Barati, N ; Barrow, A ; Batiha, A.-M. M ; Bejarano Ramirez, D. F ; Belgaumi, U. I ; Berhie, A. Y ; Bhagat, D. S ; Bhardwaj, N ; Bhardwaj, P ; Bhattacharyya, K ; Bhojaraja, V. S ; Bijani, A ; Biondi, A ; Bodicha, B. B. A ; Bojia, H. A ; Boloor, A ; Bosetti, C ; Braithwaite, D ; Briko, N. I ; Butt, Z. A ; Cámera, L. A ; Chakinala, R. C ; Chakraborty, P. A ; Charan, J ; Chen, S ; Choi, J.-Y. J ; Choudhari, S. G ; Chowdhury, F. R ; Chu, D.-T ; Chung, S.-C ; Cortesi, P. A ; Cowie, B. C ; Culbreth, G. T ; Dadras, O ; Dai, X ; Dandona, L ; Dandona, R ; De La Hoz, F. P ; Debela, S. A ; Dedefo, M. G ; Demeke, F. M ; Demie, T. G. G ; Demissie, G. D ; Derbew Molla, M ; Desta, A. A ; Dhamnetiya, D ; Dhimal, M. L ; Dhimal, M ; Didehdar, M ; Doan, L.P ; Dorostkar, F ; Drake, T.M ; Eghbalian, F ; Ekholuenetale, M ; El Sayed, I ; El Sayed Zaki, M ; Elhadi, M ; Elmonem, M. A ; Elsharkawy, A ; Enany, S ; Enyew, D. B ; Erkhembayar, R ; Eskandarieh, S ; Esmaeilzadeh, F ; Ezzikouri, S ; Farrokhpour, H ; Fetensa, G ; Fischer, F ; Foroutan, M ; Gad, M. M ; Gaidhane, A. M ; Gaidhane, S ; Galles, N. C ; Gallus, S ; Gebremeskel, T. G ; Gebreyohannes, E. A ; Ghadiri, K ; Ghaffari, K ; Ghafourifard, M ; Ghamari, S.-H ; Ghashghaee, A ; Gholami, A ; Gholizadeh, A ; Gilani, A ; Goel, A ; Golechha, M ; Goleij, P ; Golinelli, D ; Gorini, G ; Goshu, Y. A ; Griswold, M. G ; Gubari, M. I. M ; Gupta, B ; Gupta, S ; Gupta, V. B ; Gupta, V. K ; Haddadi, R ; Halwani, R ; Hamid, S.S ; Hamidi, S ; Hanif, A ; Haque, S ; Harapan, H ; Hargono, A ; Hariri, S ; Hasaballah, A. I ; Hasan, S. M. M ; Hassanipour, S ; Hassankhani, H ; Hay, S. I ; Hayat, K ; Heidari, G ; Herteliu, C ; Heyi, D. Z ; Hezam, K ; Holla, R ; Hosseini, M. S ; Hosseini, M ; Hosseinzadeh, M ; Hostiuc, M ; Househ, M ; Huang, J ; Hussein, N. R ; Iavicoli, I ; Ibitoye, S. E ; Ilesanmi, O. S ; Ilic, I. M ; Ilic, M. D ; Irham, L. M ; Islam, J. Y ; Ismail, N. E ; Jacobsen, K. H ; Jadidi-Niaragh, F ; Javadi Mamaghani, A ; Jayaram, S ; Jayawardena, R ; Jebai, R ; Jha, R. P ; Joseph, N ; Joukar, F ; Kaambwa, B ; Kabir, A ; Kabir, Z ; Kalhor, R ; Kandel, H ; Kanko, T. K. T ; Kantar, R. S ; Karaye, I. M ; Kassa, B. G ; Kemp Bohan, P. M ; Keykhaei, M ; Khader, Y. S ; Khajuria, H ; Khan, G ; Khan, I. A ; Khan, J ; Khan, M. A ; Khanali, J ; Khater, A. M ; Khatib, M. N ; Khodadost, M ; Khoja, A. T ; Khosravizadeh, O ; Khubchandani, J ; Kim, G. R ; Kim, H ; Kim, M. S ; Kim, Y. J ; Kocarnik, J. M ; Kolahi, A. A ; Koteeswaran, R ; Kumar, G. A ; La Vecchia, C ; Lal, D. K ; Landires, I ; Lasrado, S ; Lazarus, J. V ; Ledda, C ; Lee, D. W ; Lee, S. W ; Lee, Y. Y ; Levi, M ; Li, J ; Lim, S. S ; Lobo, S. W ; Lopukhov, P. D ; Loureiro, J. A ; MacLachlan, J. H ; Magdy Abd El Razek, H ; Magdy Abd El Razek, M ; Majeed, A ; Makki, A ; Malekpour, M. R ; Malekzadeh, R ; Malik, A. A ; Mansour-Ghanaei, F ; Mansournia, M. A ; Martins Melo, F. R ; Matthews, P. C ; Mendoza, W ; Menezes, R.G ; Meretoja, T.J ; Mersha, A.G ; Mestrovic, T ; Miller, T. R ; Minh, L. H. N ; Mirica, A ; Mirmoeeni, S ; Mirrakhimov, E. M ; Misra, S ; Mithra, P ; Moazen, B ; Mohamadkhani, A ; Mohammadi, M ; Mohammed, S ; Moka, N ; Mokdad, A. H ; Moludi, J ; Momtazmanesh, S ; Monasta, L ; Moradi, G ; Moradzadeh, M ; Moradzadeh, R ; Moraga, P ; Mostafavi, E ; Mubarik, S ; Muniyandi, M ; Murray, C. J. L ; Naghavi, M ; Naimzada, M. D ; Narasimha Swamy, S ; Natto, Z. S ; Nayak, B. P ; Nazari, J ; Negoi, I ; Negru, S. M ; Nejadghaderi, S. A ; Neupane Kandel, S ; Nguyen, H. L. T ; Ngwa, C. H ; Niazi, R. K ; Nnaji, C. A ; Noubiap, J. J ; Nowroozi, A ; Nuñez- Samudio, V ; Oancea, B ; Ochir, C ; Odukoya, O. O ; Oh, I. H ; Olagunju, A. T ; Olakunde, B. O ; Omar Bali, A ; Omer, E ; Otstavnov, S. S ; Oumer, B ; Padubidri, J. R ; Pana, A ; Pandey, A ; Park, E. C ; Pashazadeh Kan, F ; Patel, U. K ; Paudel, U ; Petcu, I. R ; Piracha, Z. Z ; Pollok, R. C. G ; Postma, M. J ; Pourshams, A ; Poustchi, H ; Rabiee, M ; Rabiee, N ; Rafiei, A ; Rafiei, S ; Raghuram, P. M ; Rahman, M ; Rahmani, A. M ; Rahmawaty, S ; Rajesh, A ; Ranasinghe, P ; Rao, C. R ; Rao, S. J ; Rashidi, M ; Rashidi, M. M ; Rawaf, D. L ; Rawaf, S ; Rawassizadeh, R ; Rezaei, N ; Rezapour, A ; Rezazadeh Khadem, S ; Rodriguez, J. A. B ; Rwegerera, G. M ; Sabour, S ; Saddik, B ; Saeb, M. R ; Saeed, U ; Sahebkar, A ; Saif-Ur-Rahman, K. M ; Salahi, S ; Salimzadeh, H ; Sampath, C ; Samy, A. M ; Sanabria, J ; Sanmarchi, F ; Santric Milicevic, M. M ; Sarveazad, A ; Sathian, B ; Sawhney, M ; Seidu, A. A ; Sepanlou, S. G ; Seylani, A ; Shahabi, S ; Shaikh, M. A ; Shaker, E ; Shakhmardanov, M. Z ; Shannawaz, M ; Shenoy, S. M ; Shetty, J. K ; Shetty, P. H ; Shibuya, K ; Shin, J. I ; Shobeiri, P ; Sibhat, M. M ; Singh, A. D ; Singh, J. A ; Singh, S ; Skryabin, V. Y ; Skryabina, A. A ; Sohrabpour, A. A ; Song, S ; Tabaeian, S. P ; Tadesse, E. G ; Taheri, M ; Tampa, M ; Tan, K. K ; Sharif University of Technology
Elsevier Ltd
2022
Abstract
Background: Combating viral hepatitis is part of the UN Sustainable Development Goals (SDGs), and WHO has put forth hepatitis B elimination targets in its Global Health Sector Strategy on Viral Hepatitis (WHO-GHSS) and Interim Guidance for Country Validation of Viral Hepatitis Elimination (WHO Interim Guidance). We estimated the global, regional, and national prevalence of hepatitis B virus (HBV), as well as mortality and disability-adjusted life-years (DALYs) due to HBV, as part of the Global Burden of Diseases, Injuries, and Risk Factors Study (GBD) 2019. This included estimates for 194 WHO member states, for which we compared our estimates to WHO elimination targets. Methods: The primary...