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1 [CT137]

[CT137]

[01013] Satellite Data Assimilation through Community Land Model to improve Rice Crop Dynamics

Session Date & Time : 3C (Aug.23, 13:20-15:00)
Type : Industrial Contributed Talk
Abstract : The aim of the proposed talk is to discuss evaluation of existing form of Dynamic Generalized Vegetation Model (DGVM) of Community Land Model (CLM) in terms of its bio-geophysics and processes for major agro-ecosystems such as in rice-rice crop rotation in India. Development of new crop-specific growth modules to bring out new version of DGVM suitable for Indian sub-tropics will be explored. This will be followed by its evaluation with respect to surface fluxes. The new modelling system will represent explicit crop growth processes in a terrestrial ecosystem model operable in a stand-alone mode or embedded in a climate model equipped with satellite remote sensing-based data assimilation for large-area prediction of intra-seasonal and inter-annual variability of crop phenology, growth, yield and fluxes of energy, moisture and carbon in the rice based systems at regional scale.
Classification : 76-10, 93-10, 68-XX
Author(s) :
- Mahesh Kumar (Sardar Vallabhbhai National Institute of Technology, Surat, India)
- Ranjan Kumar Jana (Sardar Vallabhbhai National Institute of Technology, Surat, India)

[02477] Effect of contact angle hysteresis in a novel microfluidic system

Session Date & Time : 3C (Aug.23, 13:20-15:00)
Type : Contributed Talk
Abstract : We present a reduced ODE model, derived from a continuum framework, for fluid flow and solute transport in a novel microfluidic system with applications for drug discovery. While the flow is gravity-driven, our analysis highlights the importance of capillary effects, exploring how contact angle hysteresis and meniscus shape modify the flow. We show how our model can be used to identify optimal parameter regimes for advective solute transport, which informs device operation and design.
Classification : 76-10, 76D45, 92-10
Author(s) :
- Barnum Swannell (University of Oxford)
- Sarah Waters (University of Oxford)
- James Oliver (University of Oxford)
- Daniela Ortiz Franyuti (Roche Innovation Center)
- Olivier Frey (InSphero)
- Michal Rudnik (InSphero)

[01515] Current density and thermal propagation of electromagnetic CoFe2O4 and TiO2/C2H6O2 + H2O hybridized Casson nanofluids: A concentrated solar power optimization

Session Date & Time : 3C (Aug.23, 13:20-15:00)
Type : Industrial Contributed Talk
Abstract : Owing to its usages, this study examines thermal transfer and current density of electromagnetic gravity driven Casson hybridized nanofluid flow through partially filled porous media with Ohmic heating. A mixture of cobalt ferrite (CoFe2O4) and titanium dioxide (TiO2) is considered for the nanoparticle’s thermal propagation in base solvent ethylene-glycol+water (C2H6O2 + H2O). A parabolic concentrated solar collector is used for the solar radiation absorption with a continuous energy supply. An invariant transformation of the partial derivative model is obtained using similarity variables. A semi-analytical shifted Chebyshev method coupled with the integrated collocation scheme has been adopted to provide theoretical solutions to the model. The study revealed that concentrated solar power current density is raised as the electric field factor and medium porosity is increased. The fluid velocity is damped while the temperature distribution is enhanced as the nanoparticle volume fraction is boosted. Thus, this investigation will improve the efficiency of thermal engineering products and enhance industrial performance.
Classification : 76-XX
Author(s) :
- Sulyman Olakunle Salawu (Bowen University)

[00071] Effects of diffusive Reynolds number on electroosmotic pulsating nanofluid flow

Session Date & Time : 3C (Aug.23, 13:20-15:00)
Type : Industrial Contributed Talk
Abstract : The estimation of the diffusion coefficient of all ionic materials is an important domain of experimental research that has several applications including the design of electrical double-layer capacitors (EDLCS ), microfluidic devices and nanofluidic devices with nanopores, etc. The great challenging task is to transport aqueous solution in a narrow confinement microchannel with fluid suction or inject it through the permeable walls. Kong et al. (2017) experimentally observed the effects of thermal response on the ion diffusion coefficient in a Graphene nanochannel for transporting NaCl electrolyte solution. They reported that the temperature increase leads to an increase in the thermal motion of ions than the bulk motion of liquid, resulting in a stable ion diffusion coefficient. This paper intends to extend our earlier mathematical model of Mukherjee and Shit (2022) under a pulsating pressure gradient scenario thereby incorporating several new complex physiological fluid flow phenomena. We examine the pulsating electroosmotic nanofluid flow phenomena in a microchannel with porous walls. The combined effects of injected nanofluid velocity and ion diffusion coefficients on the electrical potential formation are considered. The novel boundary condition is introduced so as to examine the effects of electroosmosis and frictional forces on thermal profiles and nanoparticle volume fractions of nanofluid. Being motivated by the experimental works of Kong et al. (Phys. Chem. Chem. Phys. 19 (2017) 7678), this paper aims to extend the study of ion diffusivity in terms of diffusive Reynolds number on the nanofluid temperature in the pulsating pressure gradient setting. The semi-analytic differential transform method (DTM) is used to solve the physical equations, represented as coupled ODEs, with a special emphasis on the convergence of solutions, which is presented in terms of tables and graphs. The study shows that the nanofluid velocity, temperature and mass concentration are strongly influenced by the ion diffusion coefficient and the frequency of pulsating pressure gradient. References: 1. J. Kong, Z. Bo, H. Yang, J. Yang, X. Shuai, J. Yan, and K. Cen, “Temperature dependence of ion diffusion coefﬁcients in NaCl electrolyte conﬁned within graphene nanochannels,” Phys. Chem. Chem. Phys. 19, 7678 (2017). 2. S. Mukherjee and G. C. Shit, “Mathematical modeling of electrothermal couple stress nanoﬂuid ﬂow and entropy in a porous microchannel under injection process,” Appl. Math. Comput. 426, 127110 (2022).
Classification : 76R50, 76W05
Author(s) :
- Gopal Chandra Shit (Department of mathematics, Jadavpur University, Kolkata, India)
- Satwik Mukherjee (Jadavpur University, Kolkata)

[00576] Modeling the Dispersion of Effluents Discharged into Tidally Coastal Waters

Session Date & Time : 3C (Aug.23, 13:20-15:00)
Type : Contributed Talk
Abstract : Mixing and dispersion of effluents discharged under the spring neap tidal oscillations are studied analytically on a flat seabed and a uniformly sloping bed. The solutions of two-dimensional advection-diffusion equations are presented graphically to visualize and analyze the spreading of effluent plumes in coastal waters, following discharges from a single sea outfall, multiple outfalls, and multiport diffusers, to showcase the model applications of marine outfall systems for disposal from industrial plants in the far field.
Classification : 76Rxx, 35Q35, 76-10
Author(s) :
- Anton Purnama (Sultan Qaboos University)
- Ahmed Al-Kasbi (University of Technology and Applied Sciences)