http://starc.stthomas.ac.in:8080/xmlui/xmlui/handle/123456789/24 2026-04-26T22:36:23Z 2026-04-26T22:36:23Z Oudina, F. Mebarek Preeti Sabu, A. S Vaidya, H. Lewis, R. W. Areekara, S. Mathew, A. Ismail, A. I. http://starc.stthomas.ac.in:8080/xmlui/xmlui/handle/123456789/433 2025-02-04T05:51:38Z 2023-03-02T00:00:00Z

Hydromagnetic °ow of magnetite–water nano°uid utilizing adapted Buongiorno model Oudina, F. Mebarek; Preeti; Sabu, A. S; Vaidya, H.; Lewis, R. W.; Areekara, S.; Mathew, A.; Ismail, A. I. The hydromagnetic °ow of magnetite–water nano°uid due to a rotating stretchable disk has been numerically assessed. The nano°uid °ow has been modeled utilizing the adapted Buongiorno model that considers the volume fraction-dependent e®ective nano°uid properties and the major slip mechanisms. In addition, experimentally gleaned functions of e®ective dynamic viscosity and e®ective thermal conductivity are deployed. The modeled equations are transformed into a ¯rst-order ODEs scheme employing Von K arm an's similarity conversions and then resolved via the Runge–Kutta algorithm through the shooting technique. The impact of pertinent terms over the physical quantities, nanoliquid temperature and nanoliquid concentration is explained with the support of graphs. Results show that rising volume fraction of magnetite nanoparticles (NPs) and magnetic ¯eld term enhance the drag force. Mass transport rate is demoted with augmenting values of magnetic ¯eld parameter whereas is promoted with increase in Schmidt number. Further, it is detected that the changes in stretching strength parameter are directly proportional to Nusselt number and inversely proportional to the thermal ¯eld. The ¯ndings of this numerical analysis have applications in spin coating,rotating disk reactors, storage devices for computers, food processing, and rotating heat exchangers.

2023-03-02T00:00:00Z Tak, Priya Poonia, Hemant Areekara, Sujesh Mathew, Sr. Alphonsa http://starc.stthomas.ac.in:8080/xmlui/xmlui/handle/123456789/431 2025-01-31T07:19:28Z 2024-05-01T00:00:00Z

Lie group analysis on EMHD Jeffrey nanofluid flow with exponential heat source: Heat transfer optimization using RSM Tak, Priya; Poonia, Hemant; Areekara, Sujesh; Mathew, Sr. Alphonsa The present research examines the behavior of a Jeffrey nanofluid flow across a stretching sheet under the effect of electric and magnetic fields. It comprises the Buongiorno model as well as an exponential heat source. The impact of chemical reaction has also been taken into consideration. While assuming no mass flux, the study considers boundary conditions for thermal convection and velocity slip. Lie group transformations are employed to transform the set of governing equations into a dimensionless system and later simulated using the finite difference scheme. It is found that the velocity profile rises as the Deborah number is enhanced whereas the ratio of relaxation to retardation time parameter has an inverse effect on the velocity profile. It is noted that per unit change in the Deborah number descends the drag coefficient by 31.29%. In this study, the response surface methodology and sensitivity analysis have been conducted by choosing heat transport as the dependent variable and the electric-field parameter ð0:01 � E � 0:03Þ, exponential heat source parameter ð0:02 � Qe � 0:06Þ, and Biot number ð0:15 � Bi � 0:25Þ as the independent variables. The Nusselt number escalates when the Bi number is increased and drops as the E values are raised. In the instance of the Biot number, the Nusselt number exhibits the maximum sensitivity

2024-05-01T00:00:00Z Karthika, S Viji, M http://starc.stthomas.ac.in:8080/xmlui/xmlui/handle/123456789/421 2025-01-28T06:46:55Z 2024-01-01T00:00:00Z

CHARACTERISATION OF MODULES OVER PATH ALGEBRA Karthika, S; Viji, M Let K be a field, Q = (Q0, Q1) be a quiver and KQ be the generalised path algebra [10]. This paper gives a characterisation for the right and left modules over the path algebras of finite acyclic quiver. The study shows that the modules over such path algebras could be written as the decomposition of KQ-submodules. For KQ-modules over path algebras of quiver with countably many vertices, a sequence of KQ-submodules is identified which in finite case is a composition series.

2024-01-01T00:00:00Z Parammel, Aboobacker Viji, M. http://starc.stthomas.ac.in:8080/xmlui/xmlui/handle/123456789/405 2025-01-21T06:06:42Z 2023-01-01T00:00:00Z

On quaternary resilient functions Parammel, Aboobacker; Viji, M. Functions on multiple valued logic are important tools for designing non-binary cryptographic algorithms. Cryptographic characteristics such as correlation immunity and resiliency of Boolean functions are well studied. This paper is on the resiliency of quaternary functions. We provide a method to extract a class quaternary 1-resilient functions in two variables using the group action of the permutation group S4. Using the resilient functions obtained, based on computational results using python programming language, we conjecture a technique to produce 1-resilient quaternary functions in three variables. We Also discuss orthogonal matrix characterizations of resilient functions on multiple valued logic.

2023-01-01T00:00:00Z