Journal of Thermal Science and Engineering Applications
The objective of the present work is to find out the optimal mass flux of two common refrigerants... more The objective of the present work is to find out the optimal mass flux of two common refrigerants, R32 and R410A, undergoing boiling in an evaporator tube based on the entropy generation minimization approach. An entropy generation model is developed for two-phase boiling flow based on the drift flux approach. The distinct terms for entropy generation due to heat transfer and pressure drop are developed. The optimal solutions of the present model under a practical range of parametric conditions are compared with that obtained from the existing homogeneous and separated flow-based model. Analysis reveals that increasing the evaporator diameter and heat flux increases the optimal mass flux at minimum entropy generation for both refrigerants. On the other hand, increasing the evaporator length decreases the optimal mass flux. It is observed that the optimal mass flux data for all parametric conditions deviate within 10–15% on the positive and negative sides for drift flux and homogeneo...
International Journal of Computer Science and Mobile Computing
There are persistent rumors about counterfeit money all across the world. There is a massive loop... more There are persistent rumors about counterfeit money all across the world. There is a massive loop of producing counterfeit currency that is developing alongside technology. Counterfeit currency production has gotten easier and more advanced day by day, so the detection process has gotten more challenging. Utilizing a variety of user-friendly counterfeit detection tools or software is the only method to stop fraud. Many people still do not have access to these softwares or tools for detecting fakes. Therefore, some of these programs or tools are not accurate, dependable, and free. This paper describes a potential software solution for detecting fake Bangladeshi banknotes. The most important thing is that it is totally free of cost and usable by all average people. The primary purpose of this software is to identify different currencies and determine whether it is real or fake. In this paper, Convolutional Neural Network (CNN) and FLANN-based Matcher with the Scale-Invariant Feature T...
Due to its implicit invocation nature ofAspect Oriented Programming (AOP), locating a jointpoint ... more Due to its implicit invocation nature ofAspect Oriented Programming (AOP), locating a jointpoint for executing aspect is extremely difficult. Hence,it becomes difficult to understand the application’sflow and behavior. Current AOP visualization tools havelimitations such as high dependency on other tools,confusing and excessive use of color to represent aspectsand using an outdated version of AspectJ. In thispaper, we propose a new approach collapsibletabular visualization tool to visualize and represent AOPfeatures to aid the programmers in betterunderstanding AOP applications. We have come outof traditional color-based aspect visualization and developeda web based tool: AspectViz that visualizes the aspects ina simple collapsible table. A questionnaire containingfour different questions related to aspects visualizationwas developed to compare AspectViz with currentvisualization tools. 20 graduate students andprofessional software developers were invited to participatein the test e...
Proceeding of Proceedings of the 26thNational and 4th International ISHMT-ASTFE Heat and Mass Transfer Conference December 17-20, 2021, IIT Madras, Chennai-600036, Tamil Nadu, India, 2022
Proceeding of Proceedings of the 26thNational and 4th International ISHMT-ASTFE Heat and Mass Transfer Conference December 17-20, 2021, IIT Madras, Chennai-600036, Tamil Nadu, India, 2022
This thesis addresses an adaptive higher-order method based on a Geometry Independent Field appro... more This thesis addresses an adaptive higher-order method based on a Geometry Independent Field approximatTion(GIFT) of polynomial/rationals plines over hierarchical T-meshes(PHT/RHT-splines). In isogeometric analysis, basis functions used for constructing geometric models in computer-aided design(CAD) are also employed to discretize the partial differential equations(PDEs) for numerical analysis. Non-uniform rational B-Splines(NURBS) are the most commonly used basis functions in CAD. However, they may not be ideal for numerical analysis where local refinement is required. The alternative method GIFT deploys different splines for geometry and numerical analysis. NURBS are utilized for the geometry representation, while for the field solution, PHT/RHT-splines are used. PHT-splines not only inherit the useful properties of B-splines and NURBS, but also possess the capabilities of local refinement and hierarchical structure. The smooth basis function properties of PHT-splines make them sui...
To my parents for their endless love and support A general description of a thermally coupled flu... more To my parents for their endless love and support A general description of a thermally coupled fluid flow is given by the incompressible Navier-Stokes equations coupled with the heat equation using Boussinesq approximation, whose mathematical structure is much well understood. A variational multiscale finite element approximation has been considered for the formulation of incompressible Navier-Stokes equation and heat equation. The complexity of these problems makes their numerical solution very difficult as the standard finite element method is unstable. In the incompressible Navier Stokes equations, two well known sources of numerical instabilities are the incompressibility constraint and the presence of the convective term. Many stabilization techniques used nowadays are based on scale separation, splitting the unknown into a coarse part induced by the discretization of the domain and a fine subgrid part. The mod-eling of the subgrid scale and its influence leads to a modified coa...
s Remarks and discussion on the outcomes of ITN-insist Cosmin Anitescu, Bauhaus-Universität Weima... more s Remarks and discussion on the outcomes of ITN-insist Cosmin Anitescu, Bauhaus-Universität Weimar Some general remarks on the status of the project will be made. The project objectives and deliverables will be discussed, with particular reference to the research activities in Weimar. Feedback will be solicited regarding the project outcomes at the other partners. Quadrilateral meshes for multiply connected domains through harmonic mappings Antonella Falini, JKU Linz Multiply connected domains of arbitrary shape can still represent a real challenge for creating good domain parameterizations by tensor-product splines, which are required in order to solve PDEs within the framework of isogeometric analysis. Our work aims at providing a segmentation of a given planar domain into patches that are topologically equivalent to quadrilaterals. These patches then can be easily parametrized by using wellknown established techniques, such as Coons patches or more sophisticated optimizationbased...
Providing Engineering lab equipments at each and every corner of this world is not possible but i... more Providing Engineering lab equipments at each and every corner of this world is not possible but it is possible to provide a software! Virtual Lab technology adapts this concept and provides education to as much remote as possible locations. Virtual Lab is an Embedded Android Mobile Application that interfaces with the real physical lab equipments and makes it possible to conduct experiments from remote location. Virtual Lab is connected to main Lab from a Remote lab using Internet. It is also capable of connecting using Bluetooth, provided Virtual Lab application is running in a device which is near to Lab equipment. It takes input from the user and sends corresponding signals to the hardware using HTTP protocol. Students can perform their experiments on their Android device virtually and see the live result which is carried out in the main central lab using high quality video streaming. Experiments are preloaded in the application and new experiments can be loaded by updating the a...
Journal of Thermal Science and Engineering Applications
The objective of the present work is to find out the optimal mass flux of two common refrigerants... more The objective of the present work is to find out the optimal mass flux of two common refrigerants, R32 and R410A, undergoing boiling in an evaporator tube based on the entropy generation minimization approach. An entropy generation model is developed for two-phase boiling flow based on the drift flux approach. The distinct terms for entropy generation due to heat transfer and pressure drop are developed. The optimal solutions of the present model under a practical range of parametric conditions are compared with that obtained from the existing homogeneous and separated flow-based model. Analysis reveals that increasing the evaporator diameter and heat flux increases the optimal mass flux at minimum entropy generation for both refrigerants. On the other hand, increasing the evaporator length decreases the optimal mass flux. It is observed that the optimal mass flux data for all parametric conditions deviate within 10–15% on the positive and negative sides for drift flux and homogeneo...
International Journal of Computer Science and Mobile Computing
There are persistent rumors about counterfeit money all across the world. There is a massive loop... more There are persistent rumors about counterfeit money all across the world. There is a massive loop of producing counterfeit currency that is developing alongside technology. Counterfeit currency production has gotten easier and more advanced day by day, so the detection process has gotten more challenging. Utilizing a variety of user-friendly counterfeit detection tools or software is the only method to stop fraud. Many people still do not have access to these softwares or tools for detecting fakes. Therefore, some of these programs or tools are not accurate, dependable, and free. This paper describes a potential software solution for detecting fake Bangladeshi banknotes. The most important thing is that it is totally free of cost and usable by all average people. The primary purpose of this software is to identify different currencies and determine whether it is real or fake. In this paper, Convolutional Neural Network (CNN) and FLANN-based Matcher with the Scale-Invariant Feature T...
Due to its implicit invocation nature ofAspect Oriented Programming (AOP), locating a jointpoint ... more Due to its implicit invocation nature ofAspect Oriented Programming (AOP), locating a jointpoint for executing aspect is extremely difficult. Hence,it becomes difficult to understand the application’sflow and behavior. Current AOP visualization tools havelimitations such as high dependency on other tools,confusing and excessive use of color to represent aspectsand using an outdated version of AspectJ. In thispaper, we propose a new approach collapsibletabular visualization tool to visualize and represent AOPfeatures to aid the programmers in betterunderstanding AOP applications. We have come outof traditional color-based aspect visualization and developeda web based tool: AspectViz that visualizes the aspects ina simple collapsible table. A questionnaire containingfour different questions related to aspects visualizationwas developed to compare AspectViz with currentvisualization tools. 20 graduate students andprofessional software developers were invited to participatein the test e...
Proceeding of Proceedings of the 26thNational and 4th International ISHMT-ASTFE Heat and Mass Transfer Conference December 17-20, 2021, IIT Madras, Chennai-600036, Tamil Nadu, India, 2022
Proceeding of Proceedings of the 26thNational and 4th International ISHMT-ASTFE Heat and Mass Transfer Conference December 17-20, 2021, IIT Madras, Chennai-600036, Tamil Nadu, India, 2022
This thesis addresses an adaptive higher-order method based on a Geometry Independent Field appro... more This thesis addresses an adaptive higher-order method based on a Geometry Independent Field approximatTion(GIFT) of polynomial/rationals plines over hierarchical T-meshes(PHT/RHT-splines). In isogeometric analysis, basis functions used for constructing geometric models in computer-aided design(CAD) are also employed to discretize the partial differential equations(PDEs) for numerical analysis. Non-uniform rational B-Splines(NURBS) are the most commonly used basis functions in CAD. However, they may not be ideal for numerical analysis where local refinement is required. The alternative method GIFT deploys different splines for geometry and numerical analysis. NURBS are utilized for the geometry representation, while for the field solution, PHT/RHT-splines are used. PHT-splines not only inherit the useful properties of B-splines and NURBS, but also possess the capabilities of local refinement and hierarchical structure. The smooth basis function properties of PHT-splines make them sui...
To my parents for their endless love and support A general description of a thermally coupled flu... more To my parents for their endless love and support A general description of a thermally coupled fluid flow is given by the incompressible Navier-Stokes equations coupled with the heat equation using Boussinesq approximation, whose mathematical structure is much well understood. A variational multiscale finite element approximation has been considered for the formulation of incompressible Navier-Stokes equation and heat equation. The complexity of these problems makes their numerical solution very difficult as the standard finite element method is unstable. In the incompressible Navier Stokes equations, two well known sources of numerical instabilities are the incompressibility constraint and the presence of the convective term. Many stabilization techniques used nowadays are based on scale separation, splitting the unknown into a coarse part induced by the discretization of the domain and a fine subgrid part. The mod-eling of the subgrid scale and its influence leads to a modified coa...
s Remarks and discussion on the outcomes of ITN-insist Cosmin Anitescu, Bauhaus-Universität Weima... more s Remarks and discussion on the outcomes of ITN-insist Cosmin Anitescu, Bauhaus-Universität Weimar Some general remarks on the status of the project will be made. The project objectives and deliverables will be discussed, with particular reference to the research activities in Weimar. Feedback will be solicited regarding the project outcomes at the other partners. Quadrilateral meshes for multiply connected domains through harmonic mappings Antonella Falini, JKU Linz Multiply connected domains of arbitrary shape can still represent a real challenge for creating good domain parameterizations by tensor-product splines, which are required in order to solve PDEs within the framework of isogeometric analysis. Our work aims at providing a segmentation of a given planar domain into patches that are topologically equivalent to quadrilaterals. These patches then can be easily parametrized by using wellknown established techniques, such as Coons patches or more sophisticated optimizationbased...
Providing Engineering lab equipments at each and every corner of this world is not possible but i... more Providing Engineering lab equipments at each and every corner of this world is not possible but it is possible to provide a software! Virtual Lab technology adapts this concept and provides education to as much remote as possible locations. Virtual Lab is an Embedded Android Mobile Application that interfaces with the real physical lab equipments and makes it possible to conduct experiments from remote location. Virtual Lab is connected to main Lab from a Remote lab using Internet. It is also capable of connecting using Bluetooth, provided Virtual Lab application is running in a device which is near to Lab equipment. It takes input from the user and sends corresponding signals to the hardware using HTTP protocol. Students can perform their experiments on their Android device virtually and see the live result which is carried out in the main central lab using high quality video streaming. Experiments are preloaded in the application and new experiments can be loaded by updating the a...
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