Department of Mechanical engineering: Recent submissions

Now showing items 221-240 of 1314

Development of Colburn j Factor and Fanning Friction Factor Correlations for Compact Surfaces of the Triangular Perforated Fins Using CFD

Ranganayakulu, Chennu (Taylor & Francis, 2015-07)

The necessity of increased heat transfer surface area has resulted in the development of compact heat exchangers, which are widely used in the aerospace and automobile industries. Hence perforations are made on triangular ...
Numerical analysis of compact plate-fin heat exchangers for aerospace applications

Ranganayakulu, Chennu (Emerald, 2018-02)

The purpose of this study is to find the thermo-hydraulic performances of compact heat exchangers (CHE’s), which are strongly depending upon the prediction of performance of various types of heat transfer surfaces such as ...
Flow boiling heat transfer and pressure drop analysis of R134a in a brazed heat exchanger with offset strip fins

Ranganayakulu, Chennu (Springer, 2017-05)

The saturated flow boiling heat transfer and friction analysis of R 134a were experimentally analyzed in a brazed plate fin heat exchanger with offset strip fins. Experiments were performed at mass flux range of 50–82 kg/m2 ...
Investigation of flow boiling heat transfer and pressure drop of R134a in a rectangular channel with wavy fin

Ranganayakulu, Chennu (Elsevier, 2020-01)

The saturated flow boiling heat transfer and pressure drop studies of R134a were experimentally investigated in a rectangular channel with wavy fin. Experiments were performed at mass flux range 30–50 kg m−2 s−1, heat flux ...
Boiling of R134a in a Plate-Fin Heat Exchanger Having Offset Fins

Ranganayakulu, Chennu (ASME, 2015-12)

This paper presents experimental results on boiling heat transfer of R134a in a compact plate fin heat exchanger. The exchanger is made of aluminum and has high density offset fins (30 fins/in.). Such heat exchangers are ...
The single-blow transient testing technique for offset and wavy fins of compact plate-fin heat exchangers

Ranganayakulu, Chennu (Elsevier, 2017-01)

A single-blow transient test technique is employed to measure the Colburn j factor versus Reynolds number characteristics of high efficiency compact heat exchanger surfaces having offset and wavy fins. Using the experimental ...
The combined effects of wall longitudinal heat conduction and inlet fluid flow maldistribution in crossflow plate-fin heat exchangers

Ranganayakulu, Chennu (Springer, 2000-05)

An analysis of a crossflow plate-fin compact heat exchanger, accounting for the combined effect of two-dimensional longitudinal heat conduction through the exchanger wall and nonuniform inlet fluid flow distribution on ...
Compact Heat Exchangers – Analysis, Design and Optimization using FEM and CFD Approach cover image Compact Heat Exchangers – Analysis, Design and Optimization using FEM and CFD Approach

Ranganayakulu, Chennu (Wiley, 2018-02)

A comprehensive source of generalized design data for most widely used fin surfaces in CHEs Compact Heat Exchanger Analysis, Design and Optimization: FEM and CFD Approach brings new concepts of design data generation ...
Bubble formation with pool boiling on tubes with or without basic surface modifications for enhancement

Ranganayakulu, Chennu (Elsevier, 2004-04)

Bubble formation is investigated on a single, horizontal copper tube (D=25.4 mm) before and after applying surface modifications in the form of macrocavities with comparatively simple shapes (size: 200 × 100 μm on the tube ...
Development of colburn ‘j’ factor and fanning friction factor ‘f’ correlations for compact heat exchanger plain fins by using CFD

Ranganayakulu, Chennu (Springer, 2013-03)

A numerical model has been developed for plain fin of plate fin heat exchanger. Plain fin performance has been analyzed with the help of CFD by changing the various parameters of the fin, Colburn ‘j’ and fanning friction ...
Development of heat transfer coefficient and friction factor correlations for offset fins using CFD

Ranganayakulu, Chennu (Emerald, 2011-11)

In aerospace applications, due to the severe limitations on the weight and space envelope, it is mandatory to use high performance compact heat exchangers (CHEs) for enhancing the heat transfer rate. The most popularly ...
The effects of longitudinal heat conduction in compact plate-fin and tube-fin heat exchangers using a finite element method

Ranganayakulu, Chennu (Elsevier, 1997-04)

An analysis of the crossflow plate-fin, crossflow tube-fin, counterflow plate-fin and parallel flow plate-fin compact heat exchangers accounting for the effect of ‘longitudinal heat conduction’ through the exchanger wall ...
The combined effects of longitudinal heat conduction, flow nonuniformity and temperature nonuniformity in crossflow plate-fin heat exchangers

Ranganayakulu, Chennu (Elsevier, 1999-07)

An analysis of a crossflow plate-fin compact heat exchanger, accounting for the combined effects of two-dimensional longitudinal heat conduction through the exchanger wall and nonuniform inlet fluid flow and temperature ...
Studies on pumping power in terms of pressure drop and heat transfer characteristics of compact plate-fin heat exchangers—A review

Ranganayakulu, Chennu (Elsevier, 2010-01)

Renewable energy sources like solar energy, wind energy, etc. are profusely available without any limitation. Heat exchanger is a device to transfer the energy from one fluid to other fluid for many applications in buildings, ...
The combined effects of wall longitudinal heat conduction, inlet fluid flow nonuniformity and temperature nonuniformity in compact tube–fin heat exchangers: a finite element method

Ranganayakulu, Chennu (Elsevier, 1999-01)

A finite element analysis of a crossflow tube–fin compact heat exchanger is presented. The analysis takes into account the combined effects of one-dimensional longitudinal heat conduction through the exchanger wall and ...
The effects of inlet fluid flow nonuniformity on thermal performance and pressure drops in crossflow plate-fin compact heat exchangers

Ranganayakulu, Chennu (Elsevier, 1996-10)

An analysis of a crossflow plate-fin compact heat exchanger, accounting for the effects of two-dimensional nonuniform inlet fluid flow distribution on both hot and cold fluid sides, is carried out using a finite element ...
Numerical study of flow patterns of compact plate-fin heat exchangers and generation of design data for offset and wavy fins

Ranganayakulu, Chennu (Elsevier, 2009-08)

Thermo-hydraulic design of compact heat exchangers (CHEs) is strongly dependent upon the predicted/measured dimensionless performance (Colburn factor j and Fanning friction factor f vs. Reynolds number Re) of heat transfer ...
MD simulation study to investigate nanocutting process in Cu and CuBe

Sharma, Anuj (Euspen’s, 2018-06)

Impurities and inhomogeneity in the metallic materials change the material deformation and removal mechanisms drastically based upon the impurity content in them. Even a small percentage of Be (0.5-2%) addition in Cu ...
A comparative study on the reflectivity of metallic mirrors finished by deterministic and random processes

Sharma, Anuj (AIMTDR, 2014)

Manufacturing has reached the level of finishing the metallic& non-metallic surfaces to nanoand sub- nanoregimes. Metallic mirrors finished in this regime are finding their application in visible range and near infra-red ...
Improvement in surface quality of diamond-turned aluminium substrate by using hydrogen peroxide: a molecular dynamics simulation study

Sharma, Anuj (Sage, 2020-11)

In this work, the atomic mechanism of chemical treatment on diamond-turned aluminium surface due to aqueous H2O2 is investigated using a reactive molecular dynamics simulation (R-MDS). This study is carried out to understand ...

Now showing items 221-240 of 1314

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