Clearance in two-stroke engine simulation

CFDer_1 · December 13, 2024, 11:32

Hello Everyone,

I have started a two-Stroke engine simulation in Converge version 3.1 and have a question about the sealing clearance.

How the maximum clearance between piston and cylinder should be?

I have found some discussions here on the forum that the clearance should not exceed 1e-06 m, but is this regulation for the all Converge versions? and with the two sealing methods (seal configuration panel and interface boundaries)?

Additionally, when I let the gab so small (around 1e-06 m) I got many warnings for cell pairing, after that, I measured it in the two-stroke example model and it is about 2e-06 m.

So I'm a little bit confused about the correct configurations, can any one help please?

Thanks in advance,
Regards

pradeep632 · Today, 18:53

Hi David,

For interface based sealing, sealing tolerance is not required. If you are using sealing configuration panel then your sealing tolerance should be bigger than the gap you are sealing.

December 13, 2024, 11:32	Clearance in two-stroke engine simulation	#1
CFDer_1 New Member David Join Date: Sep 2024 Posts: 16 Rep Power: 2	Hello Everyone, I have started a two-Stroke engine simulation in Converge version 3.1 and have a question about the sealing clearance. How the maximum clearance between piston and cylinder should be? I have found some discussions here on the forum that the clearance should not exceed 1e-06 m, but is this regulation for the all Converge versions? and with the two sealing methods (seal configuration panel and interface boundaries)? Additionally, when I let the gab so small (around 1e-06 m) I got many warnings for cell pairing, after that, I measured it in the two-stroke example model and it is about 2e-06 m. So I'm a little bit confused about the correct configurations, can any one help please? Thanks in advance, Regards

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Today, 18:53		#2
pradeep632 New Member Pradeep Join Date: Dec 2024 Posts: 5 Rep Power: 2	Hi David, For interface based sealing, sealing tolerance is not required. If you are using sealing configuration panel then your sealing tolerance should be bigger than the gap you are sealing.