Double Pipe Heat Exchanger

CFD Analysis of two pass Double Pipe Heat Exchanger with Fe3O4/water Nano fluid

Dissertation submitted
In partial fulfilment of requirement
For the award of degree of

Master of Technology in Thermal Engineering by Ponnada Prasanthkumar
13131D2102
Under the Guidance of
Sri B. Ajit
Assistant Professor Department of Mechanical Engineering
GAYATRI VIDYA PARISHAD COLLEGE OF ENGINEERING (AUTONOMOUS)
(Affiliated to J.N.T. University, Kakinada)
VISHAKHAPATNAM - 530048
CERTIFICATE

This is to certify that the project titled CFD Analysis of Double Pipe two pass Heat Exchanger with Fe3O4/water Nano fluid is a bonafide record of the work done by
Ponnada Prasanthkumar
(13131D2102)

In partial fulfilment of the requirements for the award of the degree of
Master of Technology in Thermal Engineering of the Gayatri Vidya

5.4 Boundary conditions given in Problem setup in ANSYS Workbench Fluent
TABLE 5.5 Boundary Conditions
S. No Boundary type Annulus Pipe Inside Pipe
1 Mass flow rate at Inlets 0.134 kg/s 0.134 to 0.267 kg/s
2 Temperatures 333 K 300 K
3 Constant heat flux at pipe wall (Insulation) 0 W/m2 ---

5.8 Method of Solution
The CFD method follows the use of commercial software ANSYS FLUENT 15.0 to solve the problem. The specified solver in FLUENT uses a pressure correction based iterative SIMPLE algorithm with 2nd order upwind scheme for discretizing the convective transport terms. The convergence criteria for dependent variables are specified as 0.001. The default values of under-relaxation factors are used in the simulation work.
In the present analysis, the analytical values of heat transfer coefficients are calculated. The heat transfer coefficients are also obtained using CFD methods and compared with analytical values. Fig. 5.5 Solution methods in ANSYS Workbench Fluent

Fig. 5.6 Initialization of Solution in ANSYS Workbench Fluent
After determining the important features of the problem following procedure is followed for solving the