Gasoline Fuel Injection Spray Modeling ANSYS CFX&FLUENT

Battousai07 · December 28, 2020, 11:10

Hello;
I am working on spray modeling for gasoline fuel injection. I have understand that this is such a complicated problem to solve. I have some questions to you.

1) In ANSYS CFX or Fluent, i can introduce the injection to my system independent from my boundaries by using DPM. However, i couldn't manage to define injection pressure. How can i do this?
2) I am doing research and literature survey on spray breakup models. I couldn't find a documentation for ANSYS CFX and Fluent where i can read the parameters for spray breakup models.
3) I want to start simple and inrease the complexity of my simulation step by step. If you have any suggestions, it would be appreciated.
Thanks in advance, Best regards.

ghorrocks · December 28, 2020, 16:25

1) Yes, you can. For defining the spray conditions, see the CFX documentation (Theory Guide, section 6.5.1)
2) It is not hard to find. Theory Guide, section 6.5.1, or the Modeling Guide section 8.
3) Your approach is wise. Do the tutorials as well, and read the documentation on the theory of the models and how to apply them.

Battousai07 · December 29, 2020, 13:56

Hi Glenn, thank you for your answer. I am reading the section you mentioned.

December 28, 2020, 11:10	Gasoline Fuel Injection Spray Modeling ANSYS CFX&FLUENT	#1
Battousai07 New Member Can Unsal Join Date: Sep 2019 Posts: 14 Rep Power: 7	Hello; I am working on spray modeling for gasoline fuel injection. I have understand that this is such a complicated problem to solve. I have some questions to you. 1) In ANSYS CFX or Fluent, i can introduce the injection to my system independent from my boundaries by using DPM. However, i couldn't manage to define injection pressure. How can i do this? 2) I am doing research and literature survey on spray breakup models. I couldn't find a documentation for ANSYS CFX and Fluent where i can read the parameters for spray breakup models. 3) I want to start simple and inrease the complexity of my simulation step by step. If you have any suggestions, it would be appreciated. Thanks in advance, Best regards.

December 28, 2020, 16:25		#2
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,932 Rep Power: 145	1) Yes, you can. For defining the spray conditions, see the CFX documentation (Theory Guide, section 6.5.1) 2) It is not hard to find. Theory Guide, section 6.5.1, or the Modeling Guide section 8. 3) Your approach is wise. Do the tutorials as well, and read the documentation on the theory of the models and how to apply them. __________________ Note: I do not answer CFD questions by PM. CFD questions should be posted on the forum.

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December 29, 2020, 13:56		#3
Battousai07 New Member Can Unsal Join Date: Sep 2019 Posts: 14 Rep Power: 7	Hi Glenn, thank you for your answer. I am reading the section you mentioned.