Modeling and Steady state thermal analysis of cylinder head with fins

hello friend....Hope you all are well and good. Here i come up with my new blog relating to modeling of cylinder with fin arrangement in NX 10.0 and Steady state thermal analysis in ANSYS 15.0. Hope You People enjoy it..... 

• Step :1 Preparation of model in NX10.0  

First of all  Prepare a 3D model in NX as per following data. You can use your own data and prepare your own model but it may cause change in simulation result and so many differences in final analysis. You can also use another modeling software like Solid works, Auto cad, Catia, Pro-E etc. Dimensions are as follows 

Figure 1: Drafting of Cylinder fin

 After doing sketching exercise you need to convert your drawing into 3D part . After creating 3D model your model like this.... 

Figure 2: 3D modeling of Cylinder fin

After complete modeling, you have to save your part in your PC in .igs or .step formats....save it in .igs file

• Step:2 Importing CAD model in ANSYS

Go to start>Workbench 15.0 and wait for starting ANSYS. Now select Steady State Thermal in the left portion of your ANSYS 

Now select the geometry option in the new steady state thermal project and double click on geometry. Select new Geometry or import. You can browse your previous .igs file in the selection window and import it. it will show as follows

Figure 3: Geometry in ANSYS

Step:3-Meshing of Model

All simulation results are visualize on meshing of the model and in fact results of simulation will also depends on the meshing parameters. So many industrial problems has differences in practical reading and software simulation results. Reason behind this is meshing. Some software are specially designed for meshing operations i.e. HYPERMESH. This software is uded widely in meshing operations and after meshing in this setup, model will be loaded in ANSYS where we are not required any meshing operations. 

Different options are available in Hypermesh for meshing and all these commands are useful for optimize our results. Right now I am not having Hypermesh setup in my laptop and so, meshing operation is done on ANSYS. Some another time I will show you meshing in Hypermesh.

Figure 4: Meshing in ANSYS

• Step:4- Applying loads on the setup

Here our setup is cylinder fins and the steady state thermal simulation will be performed so we will require a temperature as load and convection at outer fins.details of load operations are as follows

Properties
Volume	6.8782e-005 m³
Mass	0.53994 kg
Centroid X	2.2778e-005 m
Centroid Y	-1.2657e-007 m
Centroid Z	3.0169e-002 m
Moment of Inertia Ip1	4.0158e-004 kg·m²
Moment of Inertia Ip2	4.0079e-004 kg·m²
Moment of Inertia Ip3	5.1e-004 kg·m²

Inner surface of cylinder temperature is 200 C and fins are in convection conditions......

Material is Structural Steel and properties of material as follows

Density	7850 kg m^-3
Coefficient of Thermal Expansion	1.2e-005 C^-1
Specific Heat	434 J kg^-1 C^-1
Thermal Conductivity	60.5 W m^-1 C^-1
Resistivity	1.7e-007 ohm m

• Step5:- Simulation results

Figure 5- Temperature distribution in the model

Figure 6- Heat Flux distribution in model

Figure 7-Directional Heat flux distribution

Figure 8- Comparison of simulation results

 all simulation results are available after you solve the problem. Here i want to mention that in one software you also find out difference between results with different meshing operations. next result indicates a minimum temperature as 197.18 C with fine meshing with minimum element size as 1 mm and maximum element size as 1.2 mm. in previous result you will find a minimum temperature as 197.72 C

 So meshing is very important in simulation results and to optimize the results we will require a correct meshing techniques. Hyper-mesh based meshing is still required in industries because of its accuracy.

Figure 9:- Fine meshing temperature distribution

Thanks for reading this blog......hope you enjoy it...for any help you can contact me on mail or phone. For students who require help in their projects on ANSYS , Solid works or NX based can contact me......

Contact details:

E-mail:-www.andromedacad@gmail.com OR www.devangrathod13@gmail.com

Phone:-+91 8758951337 OR +91 7567622682