Anjuman Institute of Technology and Management

Bhatkal, India

Anjuman Institute of Technology and Management

Bhatkal, India
SEARCH FILTERS
Time filter
Source Type

Athani A.,Anjuman Institute of Technology and Management | Al-Rashed A.A.A.A.,College of Technological Studies | Khaleed H.M.T.,Islamic University of Madinah
AIP Conference Proceedings | Year: 2016

Heat and mass transfer in porous medium is very important area of research which is also termed as double diffusive convection or thermo-solutal convection. The buoyancy ratio which is the ratio of thermal to concentration buoyancy can have negative values thus leading to opposing flow. This article is aimed to study the influence of Dufour effect on the opposing flow in a square porous annulus. The partial differential equations that govern the heat and mass transfer behavior inside porous medium are solved using finite element method. A three node triangular element is used to divide the porous domain into smaller elements. Results are presented with respect to geometric and physical parameters such as duct diameter ratio, Rayleigh number, radiation parameter etc. It is found that the heat transfer increase with increase in Rayleigh number and radiation parameter. It is observed that Dufour coefficient has more influence on velocity profile. © 2016 Author(s).


Khaleed H.M.T.,Islamic University of Madinah | Al-Rashed A.A.A.A.,College of Technological Studies | Athani A.,Anjuman Institute of Technology and Management
AIP Conference Proceedings | Year: 2016

Heat transfer in porous medium is one of the important areas of research for last few decades. The current work is considered to investigate the effect of top and bottom wall heating of a square duct that contains porous medium between its inner and outer boundaries. The other six surfaces of duct are cooled to isothermal temperature Tc. The resulting momentum and energy equations that govern the heat and fluid flow behavior in porous medium are solved with the help of finite element method. It is observed that the heat transfer and fluid flow behavior of horizontal wall heating is quite different from other cases being reported in literature. It is found that the fluid flows in multiple circulation cells around corners of the duct giving a unique flow pattern. The isotherms tend to concentrate on lower and upper section of duct with huge middle area of cavity having least thermal energy. © 2016 Author(s).


Al-Rashed A.A.A.A.,College of Technological Studies | Athani A.,Anjuman Institute of Technology and Management | Khaleed H.M.T.,Islamic University of Madinah
AIP Conference Proceedings | Year: 2016

The present work is undertaken to investigate the behavior of opposing flow in porous medium under the influence of Soret effect in a square porous annulus. The boundary conditions are such that the outer walls of annulus are maintained at higher temperature and concentration as compared to inner walls. This heat and mass transfer phenomenon is governed by three partial differential equations. The differential equations are converted into a matrix form of equations by the application of finite element method and then solved using iterative algorithm. The results are presented in terms of isotherms, iso-concentration and streamlines indicating the thermal energy, concentration and fluid velocity inside the porous medium under applied boundary conditions. It found that the maximum value of stream function in porous medium decreases with decrease in buoyancy ratio. © 2016 Author(s).


Athani A.,Anjuman Institute of Technology and Management | Yunus Khan T.M.,University of Malaya | Yunus Khan T.M.,Alagappa Chettiar College of Engineering And Technology
AIP Conference Proceedings | Year: 2016

Investigation of heat transfer in a square porous duct is carried out. The porous medium is sandwiched between inner and outer surface of a square duct. The flow is assumed to follow the Darcy law. The governing momentum and energy equations are non-dimensionalised and then converted to algebraic form of equations using finite element method. Galerkin method is used to transform the partial differential equations into simpler algebraic equations then solved in a iterative manner to arrive at the solution. The results are presented with respect to various geometric and physical parameters such as depth of porous medium, Rayleigh number etc. It is found that the isotherms and the streamlines take symmetrical position along the vertical central line of square duct. The isotherms are penetrated into deeper area at upper half of duct as compared to lower half. © 2016 Author(s).


Iqbal Ahammed A.K.,Anjuman Institute of Technology and Management
International Journal of Fuzzy Systems | Year: 2017

In this paper, we addressed the problem of developing a robust control scheme for the MIMO nonlinear system; to achieve this, we adopt nonlinear systems with plant uncertainties, time-delayed uncertainties, and external disturbances. A fuzzy logic system is used to approximate the unknown nonlinear functions, and a Takagi–Sugeno (T–S) fuzzy observer is presented for state estimations. The designed control law works on basis of indirect T–S fuzzy control and utilizes two online approximations which allowed instantaneous insertion of finding gains of delayed state uncertainties. The benefit of employing a T–S fuzzy system is utilize of analytical results which are linear instead of approximating functions of nonlinear system with online update laws. The T–S fuzzy tracking control utilizes variable structure control method to resolve the system uncertainties, time-delayed uncertainty, and the external disturbances such that H∞ tracking performance is achieved. The control rules are derived based on a Lyapunov criterion and the Riccati inequality such that all states of the system are uniformly ultimately limited. Therefore, the effect can be reduced to any prescribed level to achieve H∞ tracking performance. A two-connected inverted pendulums system on carts used to validate the performance of the proposed fuzzy technique for the control of MIMO nonlinear systems. © 2016, Taiwan Fuzzy Systems Association and Springer-Verlag Berlin Heidelberg.


Karjinni V.V.,Sanjay Ghodawat Group Ofinstitutions | Bhavikatti M.A.,Anjuman Institute of Technology and Management
Indian Concrete Journal | Year: 2012

This paper reports the effect of curing methods on the compressive strength of Pavement Quality Concrete (PQC), produced with both Portland Pozzolana Cement (PPC) and Portland Slag Cement (PSC). Concrete mixtures were designed following the revised guidelines given by IS 10262: 2009. A non-chloride hardening accelerator was used for early strength- gain. Slump test for fresh concrete and cube compressive strength for hardened concrete were the measurements carried to evaluate the specimens cured with water and alternatively with a wax based membrane type curing compound. The results suggest that the curing methods did not affect the accelerator's optimum performance which was observed at two day in the case of the pozzolana cement mixtures. However, they did so in the case of slag cement mixtures. The average curing compound efficiency for pozzolana cement mixtures was found to be more than that for the slag cement mixtures. The curing efficiency was more at early ages.


Prasanna H.U.,Anjuman Institute of Technology and Management | Udupa K.R.,National Institute of Technology Karnataka
Nuclear Engineering and Design | Year: 2011

Authors have probed into the creep behaviour of AISI 316L stainless steel welds through the indentation creep test methodology and assessed the deterioration effects of these welds under different ageing conditions subjecting them to different test conditions. Comparison is made between the parent metal and the weld metal for integrity at different levels of ageing and test loads. It is concluded that although the aged weld's deteriorated status is not revealed at low temperature and low load test conditions, it is explicitly revealed when tested at higher temperature and higher loads. Microstructural evidences have been given by the authors and they have suggested mechanisms of creep at different test conditions. © 2011 Elsevier B.V. All rights reserved.


Udaya Prasanna H.,Anjuman Institute of Technology and Management | Rajendra Udupa K.,National Institute of Technology Karnataka
Procedia Engineering | Year: 2013

The phenomenon of dynamic strain ageing (DSA) is known to be prevalent in many of the iron and nickel based alloys which are mainly used as materials for nuclear power plant parts. This behaviour of the material is revealed as a jerky flow phenomenon in the tensile test results, when tests are performed at particular strain rate ranges. Authors probe into this aspect of the behaviour of AISI 316L stainless steel through the indentation creep test route so as to find out the implication of DSA on indentation creep test results. The occurrence of DSA is confirmed by the authors by compression tests carried out on samples of 316L with different loads at set strain rates. The authors attempt to find the evidence for DSA through creep data obtained from the indentation creep tests. Their findings reinforce the theory that there is a limiting stress above which the applied stress should pull the dislocations away from the solute atmosphere. © 2013 The Authors.


Prasanna H.U.,Anjuman Institute of Technology and Management | Udupa K.R.,National Institute of Technology Karnataka
Australian Journal of Mechanical Engineering | Year: 2016

Size being limited for preparing standard specimens for mechanical tests, the weld poses problems to researchers and scientists in estimating the strength parameters and workhardening coefficients. The integrity of the weld is difficult to probe into, particularly when the temperature of operation is much higher than the room temperature. The indentation creep test route is successfully tried by the authors to present a detailed commentary on the mechanical properties of a stainless steel weld at different test temperatures using a methodology whereby the creep test results are correlated to the compression test results and correlation equations developed. As the indentation creep tests can be carried out on a small-sized sample, the method enables one to carry out only this test to judge the mechanical properties of the welds. © 2015 Engineers Australia.


Khor C.Y.,Universiti Sains Malaysia | Abdullah M.Z.,Universiti Sains Malaysia | Abdul Mujeebu M.,Anjuman Institute of Technology and Management
Journal of Electronic Packaging, Transactions of the ASME | Year: 2012

In this paper, the finite volume method (FVM) is used for the simulation of flip chip underfill process by considering non-Newtonian flow between two parallel plates that emulate the silicon die and the substrate. 3D model of two parallel plates of size 12.75 mm × 9.5 mm with gap heights of 5 μm, 15 μm, 25 μm, 35 μm, 45 μm, and 85 μm are developed and simulated by computational fluid dynamic (CFD) code, FLUENT 6.3.26. The flow is modeled by using power law model and volume of fluid (VOF) technique is applied for flow front tracking. The effect of change in height of the gap between the plates on the underfill process is mainly studied in the present work. It is observed that the gap height has significant influence on the melt filling time and pressure drop, as the gap height decreases filling time and pressure drop increase. The simulation results are compared with previous experimental results and found in good conformity. © 2012 American Society of Mechanical Engineers.

Loading Anjuman Institute of Technology and Management collaborators
Loading Anjuman Institute of Technology and Management collaborators