The Effect of Varying the Distance to Temperature distribution Using ANSYS CFX.

Teks penuh

(1)

commit to user

The Effect of Varying the Distance to Temperature distribution Using ANSYS

CFX

THESIS

Organized to Meet a Part of the Requirements to Achieve

the Master Degree of Mechanical Engineering

By

BASHER H ALSDAI

S951208504

POSTGRADUATE PROGRAM

MECHANICAL ENGINEERING DEPARTMENT

SEBELAS MARET UNIVERSITY

SURAKARTA

(2)

commit to user

(3)

commit to user

(4)

commit to user

iv

ORIGINALITY AND PUBLICATION STATEMENT

I Declare that:

1. Thesis entitledμ “The Effect of Varying the Distance to Temperature

distribution Using ANSYS CFX” is my work and free of plagiarism, and there

is no scientific papers that have been asked by others to obtain academic degrees

and there is no work or opinion ever written or published by another person

except in writing used as a reference in this text and a reference source as well as

mentioned in the bibliography. If at a later proved there is plagiarism in scientific

papers, then I am willing to accept sanctions in accordance with the provisions of

the legislation (Permendiknas No 17, tahun 2010)

2. Publication of some or all of the contents of the thesis or other scientific forums

and permission must include the author and the team as a supervisor. If within at

least one semester (six months after the examination of the thesis) I did not make

the publication in part or entire of this thesis, the Program in Mechanical

Engineering of UNS has the right to publish in a scientific journal published by

Study Program in Mechanical Engineering of UNS. If I violate of the provisions

of this publication, then I am willing to get an academic sanction.

Surakarta, January 2015

(5)

commit to user

v

BASHER H ALSDAI, Student Number: S951208504. The Effect of Varying the

Distance to Temperature distribution Using ANSYS CFX. Supervisor I: Dr. Budi

Santoso. Supervisor II: Prof. Dr . Dwi Aries H., ST., MT. Thesis: Mechanical

Engineering Department, Graduate School, Sebelas Maret University.

ABSTRACT

This study was dealt how to solve the problem of analyzing one dimensional

unsteady state heat conduction in semi-infinite rod at constant thermal conductivity.

The problem geometry and meshing were made in ANSYS Workbench. The

mathematically model was applied on the basis of Fourier’s law. The model was

analyzed by ANSYS CFX 12.0 solver. The parameters of the model were employed for

the solution for semi-infinite rod with heat generation sources as well as laminar heat

transfer coefficient, which was h=14.52 W/m2k. The result findings showed that there

is a significant similarity between the experimental and numerical value. The residual

average at x1 distance showed the lowest value with highest coefficient sensitivity,

which was close to the 0 value. Consequently, this study suggests that the usage of

ANSYS CFX 12.0 solver can be used to accomplish the difficulty of analyzing one

dimensional unsteady state heat conduction.

(6)

commit to user

vi

PREFACE

I would like to express my greatest appreciation to my supervisors, Dr. Budi

Santoso and Dr. Dwi Aries H., ST., MT. for their guidance, support and

encouragements throughout my entire Master study.

Their meticulous attention to details, incisive but constructive criticisms and

insightful comments have helped me shape the direction of this thesis in the form

presented here, on. I am also thankful to them for their strong supports in other

aspects of life than research. I would also like to convey my gratitude to the head of

mechanical engineering department Dr. techn Suyitno. I deeply appreciate my parents

and my family. Their love and encouragement light up many lonely moments in my

life as a graduate student away from home and have been the source of courage when

I was down. I would like to express my sincere thanks to all my friends and

colleagues in the study. Their support, friendship and encouragement made my

Master study a journey of happiness.

Last, but not least, I am grateful to every individual who has helped me in one

way or another during my master study.

(7)

commit to user

ORIGINALITY AND PUBLICATION STATEMENT ... iv

ABSTRACT ... v

2.2.2.1Convection heat transfer coefficient ... 7

2.2.4 One Dimensional Heat Transfer Conduction ... 9

2.2.5Flash method ... 11

(8)

commit to user

viii

CHAPTER III METHODOLGY ... 14

3.1 Problem Formulation and data ... 14

3.2 One Dimensional Transient Heat Conduction ... 15

3.3 Steps of Simulation ... 16

3.4 Flow Chart of the Research Methodology ... 18

CHAPTER IV RESULTS AND DISCUSS ... 19

4.1 Calculate Convection Heat Transfer Coefficient ... 19

4.2 The Experimental and Numerical Result ... 20

4.3 Discuss ... 23

4.3.1 The comparison of numeric and experiment ... 23

4.3.2 Temperature difference between numerical and experimental value ... 23

4.4 Temperature residual average ... 26

CHAPTER V CONCLUSION AND SUGGESTION ... 28

5.1Conclusion ... 28

5.2Suggestion ... 28

(9)

commit to user

ix

FIGURE LIST

Figure 2.1 Heat conduction through a solid wall (Bergman et al, 2011) ... 6

Figure 2.2 Thin rod with lateral insulation (math.duke.edu) ... 10

Figure 2.3 Schematic of the flash method ... 12

Figure 2.4 Temperature increase for various experimental conditions ... 12

Figure 3.1 Straight cylindrical rod of uniform cross section (Santoso, 2001) ... 14

Figure 3. 2 Cylindrical rod design... 16

Figure 3. 1 Flowchart of the thesis ... 18

Figure 4. 1 Temperature histories using by experiment (Santoso, 2001)………… 21

Figure 4.2 Silver experimental data (Heisler-Taylor, 2013)……… 21

(10)

commit to user

x

TABLE LIST

Table 3. 1 Temperature with position and length ... 14

Table 3. 2 Boundary condition ... 17

Figur

Table 3. 1 Temperature with position and length ..................................................

Table 3.

1 Temperature with position and length .................................................. p.10

Referensi

Memperbarui...