T.Lawanya

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Assistant Professor and Mathematics/ Faculty of Engineering and Technolgy
SRM Institute of Science and Technology

T.Lawanya


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https://researchid.co/lawanya.thangaraju

RESEARCH INTERESTS

Fluid Dynamics
14

Scopus Publications

Scopus Publications

  • Numerical Role of Blood-Based Hybrid Nanofluid over Artery with Stenosis Condition
    Pragya Pandey, Abdelraheem M. Aly, T. Lawanya
    Brazilian Journal of Physics, 2025
  • Chemical reaction and heat source effects on oscillatory suction in MHD flow through permeable media with Soret effect
    Lawanya T., Pragya Pandey, Sangeetha S., Kavitha D.
    Aircraft Engineering and Aerospace Technology, 2025
    Purpose The current investigation is concerned with the Soret effect along with chemical reaction and radiation on flow of an electrically conductive, viscous fluid through a perpendicular plate, which is porous with oscillatory suction. The aim of this study is to investigate the effects of first-order temperature and chemical reaction and the transverse magnetic field characteristics. The closed form of solutions are obtained using the governing equations for concentration, energy and momentum. The perturbation technique was applied to find the result for the velocity field, temperature profiles and concentration distributions. Furthermore, the impact of various nondimensional parameters on fluid flow variables on the temperature field, velocity field and concentration dispersal was analyzed and the results were depicted graphically. Moreover, the skin friction and the rate of mass transfer (local Sherwood number) were analyzed using tables. In this work, an unsteady 2D flow of a laminar, viscid (Newtonian), electrically conducting fluid across a semi-infinite perpendicular permeable plate under motion in its plane (x-axis) embedded in a constant permeable structure was investigated. Design/methodology/approach In this work, an unstable 2D flow of a laminar, viscid (Newtonian), electrically conducting fluid across a semi-limitless perpendicular permeable plate under motion in its plane (x-axis) embedded in a constant permeable structure was investigated. The medium is considered to be under a transverse magnetic field with concentrated buoyancy effects. Furthermore, it is considered that no voltage is supplied, which indicates that there is no electrical field. The fluid properties are considered to be uniform. The concentration of the imparting species is considered as C′w at the plate; the concentration of the specimens away from the wall, C′8, is considered to be limitlessly less. The first-order chemical reaction is considered to be seen in the flow. Due to the semi-limitless plane surface considerations, the flow parameters are the functions of y′ and the time t′ only. The oscillatory suction velocity of the fluid at the plate normal to it is v′; initially, the plate relocates with the oscillatory velocity u′, in the direction of x that is in its plane. The pressure gradient is toward the x-axis. Findings The analytical solutions were obtained using the above analytical method for a few values of the governing parameters, such as the magnetic parameter (M), the permeability parameter (K), Schmidt number (Sc), chemical reaction parameter (Kr), Grashoff number for the concentration (Gm), Radiation parameter (N), Prandtl number (Pr), Chemical reaction parameter (Kr), Grashof number for heat transfer (Gr) and Heat source parameter (s). The influence of M, K, Sc, Kr, Gm, N, Pr, Kr, Gr and s on the fluid velocity, temperature and the concentration over the semi-infinite porous plate was obtained. Furthermore, the numerical computation was carried out using MATLAB. Originality/value In this chapter, the analysis of a free convective flow of a viscid compact, electrically conductive fluid was discussed during its flow through a plate in permeable condition with oscillatory suction with first-order temperature and chemical reaction and the transverse magnetic field. The problem formulation and the results were discussed. The following chapter explain the Soret effect of mass transfer and radiation with heat source on magnetohydrodynamics oscillatory viscoelastic fluid in a channel filled with porous medium.
  • Modelling the heat transfer of nanofluid towards a radiating stretching sheet of varying thickness using thermal flux
    Pragya Pandey, Dhatchana Moorthy Kavitha, Thangaraju Lawany
    Archives of Thermodynamics, 2025
    The present paper targets the flow of fluid with Fe3O4 particles as nanomaterial over a non-linear elongated sheet with changing width. The process holds vital importance in various industries like paper manufacturing, extrusion of dyes and filaments, atomic reactors and many more. Nanofluids depict special features which give them the potential to be also used in power engines, refrigerators, power plants as well as pharmaceutical processes. Hence, the presented model is designed to intensify the rate of heat transfer and to reduce energy wastage, and tailor for the optimal selection of parameters like conductivity as well as viscosity, which will improve the effectiveness of the heat transfer process. The main idea behind this investigation is to calculate the effect of electromagnetohydrodynamics, Biot number, Eckert number, radiation along with the absorption factor. In this paper, the flow is modelled by using Navier-Stokes equations which are customised to Prandtl boundary layer equations. The Adams-Bashforth predictor-corrector is used to obtain numerical solutions. The present study helps to potentially improve and achieve the desired quality of the stretching sheet. Moreover, a negligible amount of activation energy is required, finding an economical way to get suitable out-puts.
  • Parallel Computing Techniques for Solving Large-Scale Partial Differential Equation
    Vinayak Kishan Nirmale
    Communications on Applied Nonlinear Analysis, 2025
    Two-layered partial differential equations (PDEs) will be structured in this investigation using a variety of parallel mathematical techniques, such as Red Dull Gauss Seidel and Gauss Seidel. For the solution of this study, the two-layered PDEs of the elliptic and illustrated sorts were selected. Parallel Virtual Machine (PVM) is used on the correspondence among all chips of the Parallel Handling System. PVM is well-known for its item system, which enables several diverse computers to be used as flexible and easy-to-use concurrent handling resources. An evaluation of the parallel exhibition assessment including the Gauss Seidel and Red Gauss Seidel techniques in terms of execution time, speed, capability, ampleness, and transient execution will follow the graphical presentation of the mathematical results. Since the goal of this work was to create a successful Two-Dimensional PDE Solver (TDPDES), performance evaluations are simple. Numerous design and mathematical sectors will see an improvement in their examination and investigation systems thanks to this new, effective TDPDES technology..
  • Effect of Soret on MHD rotating fluid flow through a porous medium with heat and mass transfer
    Lawanya T., Vidhya M., Govindarajan A.
    Aircraft Engineering and Aerospace Technology, 2024
    Purpose The purpose of this paper to analyze the effect of Soret with heat and mass transfer on an unsteady two-dimensional Magnetohydrodynamics flow through a porous medium under the influence of the uniform transverse magnetic field in a rotating parallel plate is considered. Design/methodology/approach A mathematical model was developed using the slip conditions under unsteady state situations. Analytical expressions for the velocity, temperature and concentration profiles, wall shear stress, rates of heat and mass transfer and volumetric flow rate were obtained and computationally discussed with respect to the non-dimensional parameters. Further, the velocity reduces with increasing Hartmann number M and increases with Grashof number Gr and permeability parameter K. Findings It is observed that temperature reduces with an increase in Prandtl number Pr and ω. It is noted that the thermal radiation increases with increase in Soret number Sr, Schmidt number Sc, Prandtl number pr and ω. Originality/value Concentration decreases with an increase in radiation parameter R and chemical reaction parameter Kc.
  • MHD with Viscosity Variation and Velocity Slip between Rough Porous Conical Bearings using Couple Stress Fluid
    S Sangeetha
    Communications on Applied Nonlinear Analysis, 2024
    In this study, the effect of velocity slip with viscosity variation using MHD couple stress fluid between rough porous conical bearings is analysed. The modified Reynolds equation is solved with appropriate boundary conditions in dimensionless form to find the pressure distribution which is then used to obtain the expression for load carrying capacity paving the way for the calculation of response time. Numerical computations of the results shows that the MHD on the conical bearings indicate that the slip velocity enhances the pressure distribution and the load carrying capacity of the conical bearings. Also, the effect of roughness parameter is to increase(decrease) the load carrying capacity and the response time for azimuthal (radial) roughness.
  • An overview of crystallization, structural, optical, dielectric, and thermal characterization methods for amino acid chloride crystals and their technological uses
    Helen Merina Albert, D. Kavitha, T. Lawanya, V. B. Sreedhar, Shobha Thakur, Srinivasa Reddy Bireddy, M. P. Mallesh, C. Alosious Gonsago
    Phase Transitions, 2024
    This review concerns the growth process, characterization methods, and potential applications of amino acid and chloride derivatives. Derivatives of amino acids are an ideal option for nonlinear device use. Single-crystal, powder-X-ray diffraction, and high resolution-X-ray diffraction (HRXRD) analyses evaluated the crystal structure and crystalline perfection. Most of the chlorides of amino acid compounds were solidified into monoclinic and orthorhombic crystal structures. The FT-IR and NMR methods were deployed to identify the reported compounds’ functional groups and molecular identities. The UV and photoluminescence investigations were performed to investigate the optical characteristics of the reported compounds. Bis-glycine hydrogen chloride showed higher second harmonic generation (SHG) abilities. Laser damage threshold (LDT) and Z-scan analyses are briefly discussed. Dielectric spectroscopy was applied to study the dielectric features related to the applied frequency. Thermal investigations revealed that most crystals exhibited significant thermal stability, making them appropriate for device usage.
  • Effect of Heat Source on MHD Flow Through Permeable Structure under Chemical Reaction and Oscillatory Suction
    T. Lawanya, M. Vidhya, A. Govindarajan, E. Priyadarshini
    International Journal of Heat and Technology, 2022
    Magnetohydrodynamics (MHD) deals with the study of the magnetic properties and behaviour of electrically conducting fluids. In literature, researchers have studied. The study of MHD is widely applied in drawing of plastics and elastic sheets, metal and polymer expulsion forms, paper creation, cooling of metallic sheets, etc. Most of the previous researchers have studied only the concentration and velocity boundary layer profiles. However, the effect of heat sources using temperature boundary layer profiles is not studied. Therefore, in this work, an analysis of a convective flow of an electrically conductive, viscid compact fluid through a perpendicular plate which is porous with oscillatory suction with first-order temperature and chemical reaction and the transverse magnetic field is carried out. The developed model consists of continuity, momentum, and heat and mass transfer equations, and the perturbation technique was applied in order to find the result for the velocity field, temperature profiles, and concentration distributions. Further, the influence of the flow variables on the temperature field, velocity field, and concentration dispersal was analyzed and the results were depicted graphically. Moreover, the skin friction and the rate of mass transfer (local Sherwood number) were analyzed using tables. In this work, an unstable 2D flow of a laminar, viscid (Newtonian), electrically conducting fluid across a semi-limitless perpendicular permeable plate under motion in its plane (x-axis) embedded in a constant permeable structure was investigated.
  • Soret effects of mass transfer and radiation with heat source on MHD oscillatory viscoelastic fluid in a channel with porous medium
    T. Lawanya, M. Vidhya, A. Govindarajan
    Journal of Physics Conference Series, 2021
    Soret and radiative heat transmission impacts are considered with an unstable stream, directing viscoelastic liquid past channel with permeable medium, non-uniform walls warmth inspected. The liquid has trivial electromagnetic strength created is lesser. The impact of the mass transfer, radiation and the magnetic field constraints for speed, temperature, mass diffusion profiles for values of viscoelastic constraints discussed.
  • Effect of mass transfer and radiation on unsteady free convective flow past a vertical porous plate with variable temperature in the presence of transverse magnetic field on heat source
    T. Lawanya, M. Vidhya, A. Govindarajan
    Aip Conference Proceedings, 2020
    Right now logical investigation on MHD unstable permitted convective stream past a upright permeable plate having heat source is introduced alongside the impact of mass exchange and radiation with variable temperature. The impacts of different physical constraints on the speed, temperature and concentration are portrayed sketchily and the numerical estimations of physical amounts like Skin erosion, Nusselt number and Sherwood number for different parameters are introduced through tables.
  • Effect of mass transfer with chemical reaction on MHD convective flow through a porous medium in a hot vertical channel with thermal radiation
    M. Vidhya, T. Lawanya, A. Govindarajan, Stefano Bianchini
    Aip Conference Proceedings, 2020
  • Effect of chemical reaction and heat source on oscillatory flow of couple stress fluid in wavy channel
    T. Lawanya, M. Vidhya, A. Govindarajan, E. P. Siva
    Aip Conference Proceedings, 2019
  • Effects of heat source parameter on oscillatory flow with mass transfer in the presence of the transverse magnetic field
    T. Lawanya, M. Vidhya, A. Govindarajan, E. P. Siva
    Aip Conference Proceedings, 2019
  • Couette flow through a porous medium with heat and mass transfer in the presence of tranverse magnetic field
    T. Lawanya, M. Vidhya, A Govindarajan
    Journal of Physics Conference Series, 2018