Journal of

Thermal Engineering and Applications

(JoTEA)

Jan - April 2014

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Industrial Tribology Machine Dynamics & Maintenance

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Indian Institute of Technology Delhi, India.

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Alternative Energy Technology Laboratory,

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Indian Institute of Technology, Chennai, India.

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STM Journal (s) Advisory Board

Dr. Ashish RunthalaLecturer, Biological Sciences Group,

Birla Institute of Technology & Science, Pilani Rajasthan, India.

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Indira Gandhi Centre for Atomic Research

(ICGAR)Kalpakkam, India.

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of Civil Engineering National Institute of Technology Trichy, India.

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Pune, India.

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University, Baru Sahib, India.

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National Brain Research Centre, Manesar, India.

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Indian Institute of Technology Madras, India.

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Department of Applied Chemistry, BIT Mesra, Patna, India.

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Engineering department, PEC University of Technology,

Chandigarh, India.

STM Journal (s) Advisory Board

Editorial Board

Abdul KhaliqProfessor, Department of Mechanical

Engineering, Delhi Technological University, (formerly

Delhi College of Engineering)

Amar Mullick Professor, National Institute of Technology Durgapur, India.

Asis SarkarAssistant Professor, National Institute of

Technology, Agartala.

Ashis Kumar SenAssistant Professor, Department of

Mechanical Engineering, Indian Institute of Technology Madras.

AKM Sadrul IslamHead, Department of Civil & Environmental

Engineering & Professor, Mechanical & Chemical

Engineering Dept. Islamic University of

Technology, Gahzipur Bangladesh.

Bashar Dan-asabeShell Chair Office, Department of

Mechanical Engineering, Ahmadu Bello University, Zaria.

Chanchal LohaScientist Thermal Engineering,

CSIR- Central Materials Research Institute

Jahar SarkarAssistant Professor, Indian Institute

of Technology –Banaras Hindu University.

Manish RathodAssistant Professor, Mechanical

Engineering Department, S.V. National Institute of Technology, Surat.

Manoj AryaAssistant Professor, Department of Mechanical Engineering , Maulana

Azad National Institute of Technology Bhopal, India.

Om Prakash, ProfessorIndian Institute of Technology,

Banaras Hindu University Varanasi, India.

P BalachanderAssistant Professor, Department of

Mechanical Engineering, CEG Campus, Anna University, India.

Editorial Board

P R TailorDepartment of Mechanical Engineering S. V. National Institute of Technology,

Surat India.

P. KalaichelviAssociate Professor & Associate Dean-I(Research & Consultancy) Department

of Chemical Engineering National Institute of Technology Tiruchirappalli India.

Ramjee RepakaAssistant Professor School of Mechanical

Materials and Energy Engineering Indian Institute of Technology Ropar.

Prosejit DasScientist, CSIR-CMERI &

Assistant Professor, CSIR Durgapur, India.

P SelvakumarDepartment of Mechanical Engineering,

PSN Engineering College, Tirunelveli, India.

Randip DasProfessor and Head of the Department,

Dept. of Mechanical Engg. Indian School of Mines, Dhanbad India.

Satyabhama BhatAssistant Professor Department of Mechanical Engineering National Institute of Technology Karnataka,

Surathkal.

Shailendra Kumar ShuklaAssociate Professor, Mechanical Engineering Department, Indian Institute of Technology, Banaras

Hindu University, India.

Sitaram NekkantiProfessor Thermal Turbomachines

Laboratory Department of Mechanical EngineeringIndian Institute of

Technology, Madras.

Sudip Kumar SamantaPrincipal Scientist NNMT Group &

Coordinator, CSIR-Central Mechanical Engineering Research Institute

Durgapur, India.

Tapano Kumar HottaVisiting Assistant Professor, Mechanical

Engineering, Centre of Excellency - Energy, Indian Institute of Technology

Jodhpur (IITJ), India.

I take the privilege to present the print version for the [Volume 1 Issue (1)] of Journal of Thermal

Engineering and Applications. The intension of JoTEA is to create an atmosphere that stimulates

creativeness, research and growth in the area of in Thermal Engineering and Applications.

The development and growth of the mankind is the consequence of brilliant Research done by

eminent Scientists and Engineers in every field. JoTEA provides an outlet for Research findings and

reviews in areas of thermal engineering found to be relevant for National and International recent

developments & research initiative.

The aim and scope of the Journal is to provide an academic medium and an important reference for

the advancement and dissemination of Research results that support high level learning, teaching and

research in the domain of Thermal Engineering.

Finally, and Authors for their continued support and invaluable contributions and suggestions in the

form of authoring I express my sincere gratitude and thanks to our Editorial/ Reviewer board write

ups/ reviewing and providing constructive comments for the advancement of the journals. With

regards to their due continuous support and co-operation, we have been able to publish quality

Research/Reviews findings for our customers base.

I hope you will enjoy reading this issue and we welcome your feedback on any aspect of the Journal.

Dr. Archana Mehrotra

Director

STM Journals

Director's Desk

STM JOURNALS

1. CFD Analysis of Tree Shaped Fin Array on Flat and Symmetrical Wedge Shaped Base Plate K. Pavan Kumar, P. V. Vinay, R. Siddhardha 1

2. Heat Transfer in Pool Boiling of H O/LiBr Mixture 2

Sathyabhama A 7

3. Flame Phenomenology for Premixed Methane and Propane/Air in Developed Meso-scale Channels at Ambient ConditionsHamisu Adamu Dandajeh 13

4. Modeling and Simulation of Spiral Plate Heat Exchanger T.V. Karthick, D. Karthikeyan, S. Ramachandran, P. Kalaichelvi, S .Sundaram, R. Jaishree 22

ContentsJournal of Thermal Engineering and Applications

JoTEA (2014)© STM Journals 2014. All Rights Reserved

Journal of Thermal Engineering and Applications

Volume 1, Issue 1

www.stmjournals.com

CFD Analysis of Tree Shaped Fin Array on Flat and

Symmetrical Wedge Shaped Base Plate

K. Pavan Kumar*, P. V. Vinay, R. Siddhardha Department of Mechanical Engineering, GVP College for Degree and PG Courses

(Technical campus), Rushikonda, Visakhapatnam, A.P., India

Abstract Heat generated from electronic chips is usually siphoned off by placing a heat sink.

Due to the poor heat transfer capability of air extended surfaces are used as heat sink. Constant research is being carried out on the selection of geometry and material of

extended surface for effective heat transfer. In the present work CFD analysis (ANSYS

14) is done on Tree fin array using FLUENT on a flat shaped base and symmetrical wedge shaped base keeping the base temperature, volume of material and velocity of air

constant. The array with symmetrical wedge shaped base is proved to have better heat dissipation rate.

Keywords: Tree fin array, symmetrical wedge, tree fin

JoTEA (2014)© STM Journals 2014. All Rights Reserved

Journal of Thermal Engineering and Applications

Volume 1, Issue 1

www.stmjournals.com

Heat Transfer in Pool Boiling of H2O/LiBr Mixture

Sathyabhama A.*

Department of Mechanical Engineering, NITK Surathkal, Srinivasnagar, Mangalore, Karnataka, India

Abstract This paper presents the results of an experimental investigation carried out to study the

heat transfer in saturated nucleate pool boiling of the H2O/LiBr bromide mixture on a heated vertical copper cylindrical rod at atmospheric pressure. The mass fraction of

lithium bromide was varied from 0 to 0.5. It was observed that the heat transfer

coefficient increased for the mixture with an increase in heat flux and lithium bromide concentration. A correlation for the heat transfer coefficient as a function of heat flux

and lithium bromide concentration was obtained with a good fit to experimental data.

Keywords: H2O/LiBr, pool boiling, heat transfer coefficient, correlation

JoTEA (2014)© STM Journals 2014. All Rights Reserved

Journal of Thermal Engineering and Applications

Volume 1, Issue 1

www.stmjournals.com

Flame Phenomenology for Premixed Methane and

Propane/Air in Developed Meso-scale Channels at

Ambient Conditions

Hamisu Adamu Dandajeh* Department of Mechanical Engineering, Ahmadu Bello University Zaria, Nigeria

Abstract This paper reports the development of a meso-scale channel for propagation of methane

and propane-air mixtures at low Reynolds number. An experiment was conducted in 3, 4 and 5 mm internal quartz tube diameters at premixed conditions of the fuel/air. The tubes

were vertically mounted and sometimes preheated uniformly laterally. Uniformly laterally heating gives a zero temperature gradient. Flame phenomenology at different

equivalence ratios (φ) of the mixture was discussed. It was observed that quenching

position of the flame front somewhat increases with decrease in mixture flow rate(Q).The presence of a flame trap near the mixing chamber was found to intensify the acoustic

frequency generated. For the first time, periodic accelerating and decelerating flames

(PADFs) were observed at higher Q and φ = 0.66 for propane/air mixture in 5 mm tube.

Keywords: Meso-scale, flame, lean-premixed

JoTEA (2014)© STM Journals 2014. All Rights Reserved

Journal of Thermal Engineering and Applications

Volume 1, Issue 1

www.stmjournals.com

Modeling and Simulation of Spiral Plate

Heat Exchanger

T.V. Karthick1, D. Karthikeyan

1, S. Ramachandran

2, P. Kalaichelvi

1*,

S .Sundaram3, R. Jaishree

1

1Department of Chemical Engineering, National Institute of Technology, Tiruchirappalli, India

2Jayam College of Engineering and Technology, Dharmapuri 636813, India

3PRIST University, Trichy-Thanjavur Highway, Vallam, Thanjavur 613 403, India

Abstract The spiral-plate heat exchanger (SHE) offers efficiency in spacing and reduces heat losses. SHE’s offer high reliability, lower spaces occupancy, high heat transfer

coefficient and on-line performance in many severely fouling services such as slurries.

Experimental investigations were conducted in a spiral plate heat exchanger with hot water as the service fluid and cold water in different flow rates as the cold process fluid.

The experiments were conducted essentially in the laminar flow range of both the process and service fluids. Computer software which uses FEM and computational fluid

dynamics were used to simulate the spiral heat exchanger. The experimental data of flow

rates and inlet temperature were used as input data to the simulated SHE. The values like heat transfer coefficient, outlet temperature etc. obtained from experiment and simulation

were compared. The simulated Nusselt numbers on the cold side was correlated with Reynolds numbers and Prandtl number and were fitted into a power law equation. Hence

Dittus-Boelter’s equation for spiral plate heat exchanger was obtained. The predicted

Nusselt number showed a spread of ±2% over the simulated values.

Keywords: Spiral plate heat exchanger, modeling, simulation and computational

fluid dynamics.