How to define the valve lift profile of IC engine

November 3, 2005, 09:09

Hi all, I'd like to simulate in-cylinder phenomena with fluent6.2. every thing ok except valve lift profile.

It does not clear in the user gide for how to set th valve lift profile.

Can I define the profile easily or I need to make a UDF funtion for valve.

Please suggest,

TorN

omarsobhy · November 5, 2005, 06:18

Hi You need follow the following steps; 1) Model porous zone at the valve 2) Inertial and viscous coefficients need to be modeled through UDF 3) the udf will take care the Flow resistace i.e. high resist = valve close; Low resistance when valve is open.

November 3, 2005, 09:09	How to define the valve lift profile of IC engine	#1
TorN Guest Posts: n/a	Hi all, I'd like to simulate in-cylinder phenomena with fluent6.2. every thing ok except valve lift profile. It does not clear in the user gide for how to set th valve lift profile. Can I define the profile easily or I need to make a UDF funtion for valve. Please suggest, TorN

November 5, 2005, 06:18	Re: How to define the valve lift profile of IC eng	#2
Sachin Guest Posts: n/a	Hi You need follow the following steps; 1) Model porous zone at the valve 2) Inertial and viscous coefficients need to be modeled through UDF 3) the udf will take care the Flow resistace i.e. high resist = valve close; Low resistance when valve is open. omarsobhy likes this.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Close Domain - Engine Valve	Alessio	CFX	5	January 22, 2010 03:34
Composite Engine Valve Project	cortez505	FLUENT	1	November 18, 2009 04:02
define moving mesh for engine step by step	homan	FLUENT	0	October 26, 2005 03:27
Valve action	Hrvoje Jasak (Hjasak)	OpenFOAM Running, Solving & CFD	0	January 13, 2005 13:23
FLOW THROUGH AN ENGINE INLET VALVE	TOM	FLUENT	0	November 5, 2001 10:42