# Steam laval nozzle

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 May 2, 2007, 15:06 Steam laval nozzle #1 Ahmet Guest   Posts: n/a High. I am new in CFD and also fluent. My first project is an analysis of a laval nozzle for steam. This is a small laval nozzle for a micro steam turbine. In analysis, what is the way that I follow? What is the critical points. The inlet temperature is 823 K and inlet pressure 30 bar. I have a 7 g/s mass flow rate. Thanks for helps

 May 2, 2007, 15:50 Re: Steam laval nozzle #2 Phil Guest   Posts: n/a I'm unsure how little experience you have but the very basics of model creation are - 1)create the geometry, 2)mesh the geometry, 3)assign boundary conditions. You should do the Gambit tutorials, this would help you a great great deal. Then do the fluent tutorials to learn the solution process. If you already have a working model then just do the fluent tutorials but not the gambit ones.

 May 3, 2007, 13:44 Re: Steam laval nozzle #3 Ahmet Guest   Posts: n/a I have experience basics. There is no problem. You know. This is a compressible flow. Which method should I use. Pressure based or density based. For steam properties, can I define as ideal gas

 May 3, 2007, 16:35 Re: Steam laval nozzle *NM* #4 Phil Guest   Posts: n/a

 May 3, 2007, 16:40 Re: Steam laval nozzle #5 Phil Guest   Posts: n/a The solver options change how the code reaches the solution - but not the final result if converged to the same criterion. I would leave it standard and if it converges fine then leave it. If not then try changing from a pressure based solver. Relaxation factors are a better way to help convergence if you know how to use them efficiently. THE QUESTION YOU ARE POSING IS MORE RELEVANT TO STABLE CONVERGENCE THAN BETTER ACCURACY(if I understand your question properly)

 May 4, 2007, 11:14 Re: Steam laval nozzle #6 Ahmet Guest   Posts: n/a Thanks a lot first of all. I have a solution in pressure based type. but when I try it in density based and after I get the result, there is a big difference between mass flow rates. What is the reason of this?

 December 26, 2009, 11:26 Micro Nozzle Applet #7 New Member   Izak Join Date: Dec 2009 Posts: 1 Rep Power: 0 I am looking for a Java Applet of Laval nozzle.

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