This poster presentation presents the report on the project topic mentioned above. It shows the thermal analysis results and recommended suggestions got from the Analysis software ANSYS Multiphysics. I hope it will give you some idea about the project.

1. Thermal Analysis of High Temperature Black Body Source
Gokarna Basnet[1], Sajal Thomas[2] & Ravinder Kumar[2]
[1] Ansal University,Gurgaon,122003
[2] ITER-India, Institute for Plasma Research, Bhat, Gandhinagar - 382428, Gujarat, India
ABSTRACT
In ECE Diagnostic, Electron cyclotron emission radiation is measured to determine the plasma temperature profile. For this diagnostic, high temperature black body
source is required for testing the functionality and performance of mm wave receivers used in diagnosing the tokamak plasma. This high temperature black body
source consists of electrical heater and emissive surface of Silicon carbide material. In this poster presentation, we performed thermal analysis of heater plate using
finite element based software and give proper design of the heating element to achieve uniform surface temperature of the emissive surface. FEM based software
ANSYS is used for the thermal analysis of high temperature black body source.
INTRODUCTION
In ITER Tokamak, Electron cyclotron
emission (ECE) is measured to
determine the temperature of thermal
and non thermal electrons distribution
using detecting instruments like
heterodyne radiometers and Michelson
interferometers. [1]
In this poster presentation, we present
the Thermal analysis of heater plate
using ANSYS.
APPLICATION
To test the functionality & performance
of Michelson Interferometer.
 Used as calibration source, to measure
the accurate temperature of the plasma.
METHODS AND MATERIALS
 The Model is created in CATIA
software .
 For thermal analysis, the model
created in CAD software,CATIA, is
imported to ANSYS .
 The materials properties & required
boundary conditions are given.
Materials/Prop
erties
Ceramic Wool SS plate FeCrAl alloy
Density 350 Kg/m3 7850 Kg/m3 7280 Kg/m3
Thermal
conductivity
0.1W/mK 60.5W/mK 16W/mK
Specific Heat
at 20◦c
109.2J/KgK 434 J/kgK 460 J/kgK
Coefficient of
thermal
Expansion
2.2e-6/K 1.2e-5 /K 1.1e-5 /K
Table1: Material properties[2]
HEATER PLATE
OBJECTIVE
To get best temperature uniformity over
heating plate i.e. SS Plate for the
calibration of Michelson Interferometer
with the help of thermal analysis in
ANSYS.
The Stainless steel plate is used as the
heater plate.
The following boundary conditions are
considered for the analysis of model.
Radiation Convection
Emissivity of coil:
0.7
Ambient
temperature:27◦c
Coil temperature:
1000◦c
Ambient temperature: 27◦c
Convective heat transfers coefficient of
air:
5e-6 W/mm2◦c
Convection heat loss from top of SS plate
surface to air.
Table 2: Boundary conditions
RESULTS
 After applying the material properties &
boundary conditions, the meshing of the
model is done to discretize the model into
finite number of element. which helps to
approximate the result.
 ANSYS Multiphysics is used to do the
thermal analysis of our model & we get
following temperature distribution over SS
plate.
Figure 1: Temp. Distribution over SS plate
Figure 2. Temp. distribution of cord on the top surface.
Figure 3.Temp Distribution of cord on bottom surface
760
770
780
790
800
810
820
830
840
850
860
1 2 3 4 5 6 7 8 9 10
Temperature(°C)
Distance from centre(mm)
Top surface line Temp(°C) Bottom Surface line Temp(°C)
Chart 1: It shows the variation of temperature from center to edge
Cords Temperature Uniformity (%)
At Top surface ±3.91
At Bottom Surface ±3.55
Table 4: % Temp. Uniformity on cords
CONCLUSIONS
Thermal model is under development to simulate the
realistic scenario.
The temperature uniformity over heater plate is
approximately 3.606%.
REFERENCES
[1] Calibration Source for Electron Cyclotron Emission
Measurements by K. Kawahara, M. Sakamoto, J. Fujita, H.
Matsuo and K. Sakai [(Received - Jan. 19, 1990)]
[2]http://maruojp.com/maruo_homepage/english_contents/item/it
emibiwool.html
Figure 1: SS plate model
FUTURE WORK
 Development of thermal model to compute
temperature distribution.
 Design & development of high temperature
radiation source .
 Check the temporal stability of source temperature
distribution for the longer time operation.