8 results on '"Siva, E. P."'
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2. Correction: Heat and mass transfer in double-diffusive mixed convection of Casson fluid: biomedical applications
- Author
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Bathmanaban, P., Siva, E. P., Santra, S. S., Askar, S. S., Foul, A., and Nandi, S.
- Published
- 2024
- Full Text
- View/download PDF
3. MHD peristaltic two-phase Williamson fluid flow, heat and mass transfer through a ureteral tube with microliths: <italic>Electromagnetic therapy simulation</italic>.
- Author
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Deepalakshmi, P., Siva, E. P., Tripathi, D., Bég, O. Anwar, and Kuharat, S.
- Abstract
Abstract\nCULMINATIONSThe ureter typically experiences a frequency of one to five peristaltic contractions per minute. However, it is important to note that these contractions can be disrupted by various physical and mechanical irritants. Ionic contents in the urine make it electrically conducting and responsive to electromagnetic body forces. MHD can be deployed in bio magnetic therapy to control or mitigate symptoms associated with peristaltic pumping in the urinary system. This article therefore focuses on the hydromagnetic effects on flow patterns of urine with debris (monoliths). The mechanism of urine flow is largely coordinated by the kidneys. The flow inside the ureter is interrupted by microliths, which are generated by the sedimentation of excretory products. To simulate this, a two-phase formulation is adopted, comprising the electromagnetic urological viscous fluid phase and the particulate phase for solid grains. The peristaltic propulsion of two-phase liquid in the ureter is simulated as a sinusoidal wave propagation of incompressible non-Newtonian fluid. The Williamson viscoelastic model is deployed for the rheology. Heat transfer is also included with Soret thermo-diffusion and viscous heating effects. Long wave and low Reynolds number approximations are employed based on lubrication theory. The mass, momentum, energy and concentration conservation equations with associated boundary conditions are rendered non-dimensional
via appropriate scaling transformations. A numerical solution is achievedvia BVP4C MATLAB quadrature. Graphical visualizations of the velocity, temperature and concentration (solid grains) are given for the influence of suspension parameter (ζ), Hartmann number (M ), Prandtl number (Pr ), Weissenburg number (We ), particle volume fraction (C ), Eckert number (Ec ), Soret number (Sr ), Schmidt number (Sc ).The novelty of the present work is therefore the simultaneous consideration of a generalized two-phase model, wall slip, non-Newtonian characteristics, cross diffusion, viscous dissipation, mass diffusion, magnetic body force and curvature effects in peristaltic urological transport, which has not been undertaken previously . The detailed simulations reveal that the flow velocity is reduced due to the presence of solid particles and the channel curvature, in comparison to the flow in an unobstructed channel devoid of solid particles. Enhancing the hydrodynamic slip parameter speeds up the movement of particles and fluid near the channel walls, boosts wall skin friction, raises pressure difference in the pumping area, and amplifies bolus magnitudes.The rise in peristaltic pumping results in a reduction in solid particle concentration, which is significant phenomena.This theoretical approach may aid in treating conditions such as Urinary Tract Infections (UTIs). The computations effectively demonstrate that significant manipulation of urological pumping characteristics can be achieved with an electromagnetic field. Some new features of two-phase ureteral dynamics are highlighted as relevant to magnetic therapy techniques, which may be beneficial to clinicians.A detailed new formulation is given for magnetohydrodynamic (MHD) two-phase Williamson non-Newtonian ureteral transport with mass diffusion, Soret cross diffusion, viscous heating and peristaltic wave propulsion.We compute numerically the pressure gradient, skin friction, Nusselt number, and wall shear stress in a planar channel with flexible walls, which serves as a model for the ureter under a transverse magnetic field.We also investigate the impact of Hartmann number and Weissenberg non-Newtonian number on fluid and particle phase velocities.The present work reveals some interesting insights into electromagnetic ureteral peristaltic multi-phase non-Newtonian thermo-solutal transport phenomena via extensive visualization.There is a strong suppression in the ureteral fluid phase velocity for greater magnetic field confirming the excellent flow control abilities of Magnetic Ureteral Therapy (MUT).A detailed new formulation is given for magnetohydrodynamic (MHD) two-phase Williamson non-Newtonian ureteral transport with mass diffusion, Soret cross diffusion, viscous heating and peristaltic wave propulsion.We compute numerically the pressure gradient, skin friction, Nusselt number, and wall shear stress in a planar channel with flexible walls, which serves as a model for the ureter under a transverse magnetic field.We also investigate the impact of Hartmann number and Weissenberg non-Newtonian number on fluid and particle phase velocities.The present work reveals some interesting insights into electromagnetic ureteral peristaltic multi-phase non-Newtonian thermo-solutal transport phenomena via extensive visualization.There is a strong suppression in the ureteral fluid phase velocity for greater magnetic field confirming the excellent flow control abilities of Magnetic Ureteral Therapy (MUT). [ABSTRACT FROM AUTHOR]- Published
- 2024
- Full Text
- View/download PDF
4. A Numerical Investigation of Thermal and Mass Exchange of Blood Along Porous Stenosis Arterial Flow With Applied Magnetic Field.
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Shankar, G. and Siva, E. P.
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ARTERIAL stenosis , *PULSATILE flow , *NEWTONIAN fluids , *MAGNETIC fields , *BLOOD circulation , *CHEMICAL processes , *BLOOD flow - Abstract
Hemodynamics in stenosed arteries is complex, including turbulence, recirculation, and vortices, which can further worsen the disease. This study provides an overview of blood flow characteristics in stenosed arteries, focusing on flow physics, stenosis geometry, and severity. This present article examines the impact of heat and mass exchange on blood flow in arterial stenosis, taking into account chemical processes, magnetic fields, and thermal radiation. The features of vital fluid (blood) in the constricted arterial tube are examined by taking blood as Newtonian fluid in the arterial stenosis region. The continuity (mass), momentum, and concentration equations are solved using a finite difference approach with the help of appropriate boundary conditions. Solutions have been established for axial velocity, temperature, and concentration equations with variable parameters in blood circulation. It is noticed that an enhancement in the Reynolds number indicates more disorder in the velocity of the blood flow near the downstream area of cholesterol or plaque deposition. The temperature profile induced is stronger nearer to the arterial complaint wall downstream of stenosis. These findings for RBC's flow in stenosis-contained arteries have significant advantages in terms of understanding the disease mechanisms, developing accurate computational models, and identifying effective treatment strategies for patients. [ABSTRACT FROM AUTHOR]
- Published
- 2024
5. Effect of thermally radiative heat transfer and heat source on peristalsis of a couple stress fluids through the porous micro channel in the occurrence of MHD.
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Siva, E. P., Balaji, N., Vijayakumar, B., Bathmanaban, P., and Shankar, G.
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HEAT transfer , *PERISTALSIS , *MAGNETOHYDRODYNAMICS , *TEMPERATURE distribution , *PRANDTL number , *DRUG delivery systems , *FREE convection , *HEAT radiation & absorption - Abstract
The core goal of the article is to inspect the effect of thermally radiative heat transmission and heat source on peristalsis of a couplestress liquid in the asymmetric microfluidics conduit. The normalized 2D flow governing equations for momentum and energy are balanced using non dimensional quantities and simplify using the approximation wavelength is so long compared with Reynolds number is too small. All the solutions like velocity flow and temperature profile are illustrated with MATLAB software under the effects of important parameters like Hartmann number, Darcy number, Prandtl number, heat source/sink parameter and thermal radiation parameter. It is observed that increasing in Prandtl (Pr) number and Eckert (E) number will lead to increase in temperature distribution. These types of observations may be applicable to develop EMHD for drug delivery system and blood transport in micro vessels. [ABSTRACT FROM AUTHOR]
- Published
- 2022
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6. Risk based pricing using k-means clustering.
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Sanjana, N. B., Ishwarya, M., Balaji, N., and Siva, E. P.
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K-means clustering ,PRICES ,CREDIT analysis ,CREDIT risk ,CENTROID ,CREDIT ratings - Abstract
Credit Risk Analysis is a process adapted by loan associations to evaluate the risk -based pricing for sanctioning loans. The chances of approving loans depend on the customer's credit score, which includes annual income, banking history, loan, insurance and different elements of risks such as default risk, credit correlation risk, collateral risk, credit concentration risk, rating migration risk and recovery risk. Results of the calculation allow lenders and customers to assess credit profile characteristics. Data Science allows discovering of new patterns within a complex data set which can be an efficient method to compute risk percentage by means of non – hierarchical clustering. K-means is an iterative algorithm - the idea is to use small unstructured groups of data of fixed size, assigned to clusters to be stored in the memory depending on the previous locations of the cluster centroids. It is validated that the suggested technique predicts better accuracy, is a faster and targeted approach than existing methods. [ABSTRACT FROM AUTHOR]
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- 2022
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7. Risk and effective analysis of COVID-19 vaccine using mathematical models in the pandemic situation.
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Balaji, N., Sanjana, N. B., Siva, E. P., Lokesh, R., and Catherina, A. J.
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COVID-19 pandemic ,VACCINE effectiveness ,COVID-19 vaccines ,MEDICAL technology ,MATHEMATICAL models - Abstract
In the present situation COVID-19 global pandemic, an overall world got embrace with covid-19 virus. Moreover every country went under quarantine and firm mitigation measures by temporary shutdown in people crowded place like schools, restaurants, theatres and domestic and international transport facilities[1]. So government made these measures to be effective to support and compliance of public[2]. Advanced medical technology put up with new vaccines to control infection of virus. Vaccination is one of the most effective step to control the virus from affecting the entire population. This paper aims to explore the optimal effectiveness of Vaccination for novel COVID-19 non clinical approach. We need smart solutions and decisions to mitigate the coronavirus's impact. We formulate the mathematical model to Analyse the vaccination effectiveness[3]. The objective function is designed to reduce both awareness of vaccination and effectiveness of vaccination using WHO data/ Indian dashboard data[4]. The degree of protection As a part we can analyse the risk factors of immunization using multivariate models using statistical analysis. [ABSTRACT FROM AUTHOR]
- Published
- 2022
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8. Effect of Preoperative Use of Nonsteroidal Anti-inflammatory Drugs on Dental Sensitivity Induced by Dental Bleaching in the Dental Office: A Systematic Review and Meta-analysis.
- Author
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da Silva A, Muniz R, de Assis C, da Siva EP, de Albuquerque MS, Lago M, and Braz R
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- Humans, Anti-Inflammatory Agents, Non-Steroidal adverse effects, Dental Offices
- Abstract
Aim: This systematic review and meta-analysis evaluated the effect of using nonsteroidal anti-inflammatory drugs (NSAIDs) before dental bleaching sessions in the dental office on postoperative sensitivity., Methods: The review is reported according to the Preferred Reporting Items for Systematic Reviews and Meta-analyses checklist and registered on International Prospective Register of Systematic Reviews under number CRD42020210054. Randomized clinical trials published in the English language that compared the preventive use of NSAIDs with a placebo on the sensitivity resulting from dental bleaching in the dental office were selected, with no limitation on the year of publication. The electronic searches took place in PubMed/MEDLINE, Scopus, Web of Science, and Cochrane Library and were carried out independently by two researchers. A total of 30 articles were obtained; seven were selected according to the inclusion criteria., Results: No significant differences were found in the reduction of dental sensitivity between the experimental group compared to the placebo during the session (p=0.32; mean difference [MD]=-0.30; 95% CI, -0.88 to 0.29), immediately after the session (p=0.22; MD=-0.29; 95% CI, -0.75 to 0.17), up to 1 hour later (p=0.10; MD=-0.94; 95% CI, -2.06 to 0.18), and between 1 and 24 hours after the procedure (p=0.78; MD=-0.11; 95% CI, -0.90 to 0.68). The incidence of sensitivity between the groups also did not show statistically relevant differences (p=0.60; MD=1.15; 95% CI, 0.69-1.92). Furthermore, none of the studies reported side effects in any patient., Conclusion: This systematic review and meta-analysis indicates that the use of NSAIDs before dental office bleaching is not effective in reducing dental sensitivity during or up to 24 hours after the procedure. In addition, there was no difference in the incidence of sensitivity between the experimental and placebo groups., (©Operative Dentistry, 2022.)
- Published
- 2022
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- View/download PDF
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