# Boundary condition on 3D Supersonic nozzle problem with atmosphere

 Register Blogs Members List Search Today's Posts Mark Forums Read

 April 1, 2010, 21:59 Boundary condition on 3D Supersonic nozzle problem with atmosphere #1 Member   Dokeun, Hwang Join Date: Apr 2010 Posts: 71 Rep Power: 7 Hello I try to solve an unsteady problem that supersonic nozzle flow(from the combustion chamber) impinges on a gas deflector. During the solve this problem, there are thousands cells under 300K, and under 1000Pa.. and it's doubful if this problem goes well. I have 3D grid(L x W x H : 30x10x35 in meter) that has symmetry. 2 species(hot gas and air) for material and the hot gas has Cp which is function of temperature, 26 for molecular mass, other is ideal or constant. air is.. air with ideal gas properties. Here is my BC setting.. - nozzle inlet(combustion chamber) mass flow rate : 300 kg/s supersonic/initial guage pressure : 101325Pa total temp : 3900K - atmosphere(pressure farfeild) Mach # : 0 guage pressure : 101325Pa temp : 300K - wall nonslip condiiton for moment adiabetic for thermal condition Initial conditions are 300K, 101325Pa I set the under limit as 300K for T, 1000Pa for static pressure

 Tags atmosphere, boundary conditions, supersonic nozzle

 Thread Tools Display Modes Linear Mode

 Posting Rules You may not post new threads You may not post replies You may not post attachments You may not edit your posts BB code is On Smilies are On [IMG] code is On HTML code is OffTrackbacks are On Pingbacks are On Refbacks are On Forum Rules

 Similar Threads Thread Thread Starter Forum Replies Last Post newj CFX 2 August 9, 2012 18:01 suitup OpenFOAM Bugs 15 October 14, 2010 22:18 wanie Fluent UDF and Scheme Programming 0 December 11, 2009 11:40 sam FLUENT 2 July 20, 2003 02:19 M Rad Main CFD Forum 12 November 27, 1998 13:49

All times are GMT -4. The time now is 18:03.