
M. R. LollchundUniversity of Mauritius | UoM · Department of Physics
M. R. Lollchund
PhD
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58
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Introduction
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Publications
Publications (58)
Background
The Weather Research and Forecasting (WRF) Model is an exceptional software for mesoscale climate modeling. It is extensively used to simulate key meteorological variables, including temperature, rainfall, and wind.
Methods
This study thoroughly examined the effectiveness of the WRF model in generating precise wind data for assessing th...
Introduction: The electricity generated from nuclear plants and petroleum-based products has a negative influence on the environment as a whole. It has shown the utility to search out and promote the utilization of renewable, environmentally friendly, and sustainable energy sources such as solar, wind, and geothermal. Nowadays, Wind energy resource...
The present article describes a dataset encompassing model outputs generated by the Weather Research and Forecasting (WRF) regional climate model. A high-resolution (1km) downscaling simulation was performed over two tropical islands, Reunion and Mauritius, situated in the South-West Indian Ocean (SWIO), with initial and boundary conditions provide...
The electricity generated from fossil fuel and nuclear energy has negative impacts on the environment and has shown a need to search for and promote the use of clean, renewable and sustainable energy resources such as wind, solar and geothermal resources. Nowadays, wind energy resource has emerged as the fastest-growing source of energy on an overa...
This study investigates the diurnal variability of surface solar radiation (SSR) over
Reunion, and how it is affected by synoptic and intraseasonal climate variability. Using
a diurnal classification based on SARAH-E satellite SSR data at 5km resolution,
several key features of SSR variability are revealed. Spatially, SSR anomalies are
larger in th...
A novel idealized and incompressible fluid flow governing model is introduced, namely, the two-dimensional quasi-hydrostatics thermal rotating shallow water equations. The potential vorticity for the new model is computationally analyzed through the Hamiltonian formulation of the Eulerian variables using the noncanonical Poisson brackets. Both simi...
The capacity for phase change material (PCM) to absorb and release latent heat has led to its applications in heating/cooling strategies in solar heating systems, air-conditioning system, electronics cooling and food preservation. The use of PCM in building construction through micro/macro-encapsulation to passively cool/heat a living space has att...
Economic growth and population expansion in Mauritius have driven unprecedented rates of development. Most notably, increased urbanization of flood-prone regions has exacerbated challenges around resilience and vulnerability to recurrent flooding. We implement a multi-criteria model consisting of a physical-oriented, a social-oriented and an econom...
Due to climate change, extreme rainfall and drought events are becoming more and more frequent in several regions of the globe. We investigated the suitability of employing statistical and fractal (or scaling) methods to characterise extreme precipitation and drought events. The case of the island of Mauritius was considered, for which monthly mean...
In the context of developing wind energy for the generation of electricity in many countries, proper knowledge and understanding of the availability of wind resources over these countries are of great importance. This paper demonstrates how the Weather Research and Forecasting (WRF) mesoscale model can be used to simulate the wind flow patterns ove...
Exergy is the term which relates to the ‘quality’ of the work potential of a system. It is usually split into kinetic exergy, physical exergy, chemical exergy and potential exergy. Hence, giving a more realistic background on the performance of the system. For wind energy systems, kinetic exergy and physical exergy are the only relevant quantities....
This paper presents a Multi-Criteria Decision Making (MCDM) process together with Geographic Information System (GIS) to analyse multiple constraints that affect the siting of wind farms. Firstly, exclusion zones are identified and are removed from the potential wind farm placement regions of the wind resource map layer. A set of nine selected eval...
Faced with the impacts of climate change, countries around the world are striving to adopt renewable sources of energy in order to reduce their emission of CO2 gases. There are several planned onshore wind farms at advanced stages that are soon to be made operational, but there is an increasing issue in the form of land area scarcity, hence highlig...
Shaft based processes are used in many disciplines such as in metallurgical and chemical engineering. However, their performance suffers due to the lack in understanding of solid and gas flow thus the heat and mass transfer inside the shaft. Therefore, in this article the study of solid flow has been carried out in presence of gas flow under counte...
In this paper, an analytical framework is developed using fuzzy logic to evaluate optimal sites for wind, solar and hybrid wind-solar farms; using criterial components for energy optimization through climatological, topographic and human factors. The model is applied through a case study to the island of Mauritius which bears a highly complex topog...
The decoupling of energy prices from fossil fuel is slowly making its way as investment is poured into renewable energy sources. Small Island Developing States are gaining in both stability and cost from this momentum but face threat from the same unsustainable centralization practices. A decentralized framework is proposed for Small Island Develop...
The Weather Research and Forecasting (WRF) modelling system is used to generate high resolution wind speed maps. In order to optimise the WRF model, a sensitivity test is performed to determine the best combinations of physics to be used for simulating the climate topology over the Island of Mauritius using WRF. More specifically, this paper gives...
Mauritius has embarked itself on deploying renewable energy sources to reduce its dependency on fossil fuels and to move towards a more sustainable electrical energy production. Wind energy is considered as one of the most interesting sources for producing electricity in the island. However its commercial exploitation will mainly depend on the avai...
A Genetic Algorithm (GA) is developed for optimizing the siting of turbines in a wind farm with the aim of maximizing energy and with Levelized Cost of Energy (LCOE) less than the target price. The GA model uses both wind data measured onsite and obtained from software such as Weather Research Forecast (WRF). It also considers the local terrain bou...
An accurate CFD modelling of wind flow around a city is important for a large variety of application. CFD simulations are heavily influenced by the large number of computational parameters defined in the model. This article presents a thorough and broad sensitivity study of the impact of computational parameters on the numerical outcome for wind fl...
This paper discusses about the
assessment of a nearshore wind farm using an
integrated computational approach. The wind
flow patterns over the selected wind farm region is
generated using a Computational Fluid Dynamics
(CFD) model and the wind farm layout evaluated
using the Park Optimizer algorithm. A typical
nearshore wind farm case study is cons...
An electromagnetic-thermal-chemical numerical model is presented for simulating the dynamics of laminar reactive flows under microwave heating. Within the computational domain, the steady-state electromagnetic fields are evaluated by solving Maxwell equations using the FDTD method, whereas heat, flow and chemical reaction effects are modelled from...
In this paper results obtained from two CFD solvers, WindSim and OpenFOAM, have been compared for the wind flow around the University of Mauritius’s campus for different wind directions, and a reference incident wind speed at diverse height above ground level. A grid resolution study is performed for both software and the mean differences of the tw...
A study was carried out to analyse the potential of wind energy in the generation of electricity for a smart city which is located in the South-East Coastal Zone of Mauritius. A flat land area of 10 square km situated about 3.5 km from the smart city was chosen for the placement of a wind farm. The viability of the location was assessed by analyzin...
Computational fluid dynamics (CFD) has become a very useful tool to study the wind flow patterns over complex terrains. The present work evaluates the performance of some well-known CFD software for this endeavour. The CFD software considered are OpenFOAM and WindSim, each solving numerically the Reynolds Average Navier-Stokes (RANS) equations in t...
Interests in wind energy have gained impetus in many developed and developing countries worldwide during the last three decades.
This is due to awareness of the population about the depletion of fossil fuels as well as Government campaigns and initiatives to
encourage the use of renewable sources of energy.Thiswork focuses on the wind energy potent...
Microwave energy transmission from a coaxial line into a water-filled high-pressure reactor through a sapphire window is investigated numerically at 2.45 GHz. The FDTD method is implemented in cylindrical co-ordinates to compute the normalized electric field along the coaxial line and to extract reflection coefficients. The magnitude of reflection...
The Sylvester equation arises in many application areas, for
instance process and system control, and in the fuzzy setting,
solution of this equation has been considered only in the case when
the right-hand side matrix is a fuzzy matrix. This paper introduces
the fully fuzzy Sylvester matrix equation
$\widetilde{A}\widetilde{X} - \widetilde{X}\wide...
A wind energy assessment is an integrated analysis of the potential of wind energy resources of
a particular area. In this work, the wind energy potentials for Mauritius have been assessed using a
Computational Fluid Dynamics (CFD) model. The approach employed in this work aims to enhance the
assessment of wind energy potentials for the siting of l...
Computational Fluid Dynamics (CFD) has become a very useful tool to study the wind flow patterns over complex terrains. The present work evaluates the performance of some well-known CFD software for this endeavor. The CFD software considered are OpenFOAM and WindSim, each solving the Reynolds Average Navier-Stokes (RANS) equations in the turbulent...
This paper focused on the statistical modelling of wind speed data observed at two locations in Mauritius using some standard probability distribution functions (PDF). The objective was to determine the best PDF which can represent the data. The PDFs considered were Weibull, Rayleigh, Lognormal, Gamma, Normal and Frechet. The parameters for each PD...
In this paper, we propose the use of the Ensemble Empirical Mode Decomposition (EEMD) method in the analysis of trends in climate data. As compared to existing traditional methods, EEMD is simple, fast and reliable. It works by decomposing the time-series data into intrinsic mode functions until a residual component is obtained which represents the...
In this paper, the Ensemble Empirical Mode Decomposition (EEMD) method is employed to analyze the trends in climatic parameters over the tropical SouthWest Indian Ocean (SWIO) basin. The latter, which spans from the latitudes 5 S to 35 S and the longitudes 30 E to 70 E, comprises of various tropical islands and part of the eastern coast of Afri...
In this paper, we compare the performances of three iterative solvers for large sparse linear systems arising in the numerical computations of incompressible Navier-Stokes (NS) equations. These equations are employed mainly in the simulation of microwave heating of liquids. The emphasis of this work is on the application of Krylov projection techni...
Many of the different numerical techniques in the partial differential equations framework for solving option pricing problems have employed only standard second-order discretization schemes. A higher-order discretization has the advantage of producing low size matrix systems for computing sufficiently accurate option prices and this paper proposes...
This paper studies and contrasts the performances of three iterative methods for computing the solution of large sparse linear systems arising in the numerical computations of incompressible Navier-Stokes equations. The emphasis is on the traditional Gauss-Seidel (GS) and Point Successive Over-relaxation (PSOR) algorithms as well as Krylov projecti...
It is well-known that pulverised coal injection in an iron-making blast furnace improves the furnace productivity and stability. However, with increase in the injection rate of the pulverised coal, some amount of coal remains unburnt. In the form of powder, the unburnt coal flows along with the gas and under certain conditions accumulates in the lo...
The injection of pulverised coal along with the hot air blast in an iron-making blast furnace has contributed to lower the green house emissions and improve both the stability and productivity of the furnace. However, at high injection rates, some coal in the form of powder accumulates in the lower part of the furnace and obstructs the gas and liqu...