# static pressure from mass flow rate

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 October 22, 2004, 05:37 static pressure from mass flow rate #1 SAM Guest   Posts: n/a it is stated in fluent user guide that for target mass flow rate it finds the mean static pressure and then finds mass flow rate and then subtract from target mass flow rate and finds again static pressure i want to know by whcih equation it finds that static pressure , coz we dont know the mach number , total pressure at outlet etc regards

 October 22, 2004, 07:44 Re: static pressure from mass flow rate #2 Leon Guest   Posts: n/a Quote from method 2: Second Step: use the required mass flow rate (the target mass flow rate), the current computed mass flow rate, and mean static pressure in ---Bernoulli's equation ---- to obtain a new mean static pressure value, applying under-relaxation to keep the solution stable. And it is almost the same for method 1 since mass-flow rate is known for the previous iteration

 October 22, 2004, 07:52 Re: static pressure from mass flow rate #3 SAM Guest   Posts: n/a but bernouli equaton, where does it contain mass flow rate term confused plz help

 October 22, 2004, 08:49 Re: static pressure from mass flow rate #4 Leon Guest   Posts: n/a G {mass-flow rate }= B {constant, properties}* P_tot * function (P_tot, P_stat) * Area / sqrt ( R_gas * T_tot)

 October 22, 2004, 09:23 Re: static pressure from mass flow rate #5 SAM Guest   Posts: n/a thanks i will try it and let u know regards

 October 22, 2004, 09:37 Re: static pressure from mass flow rate #6 SAM Guest   Posts: n/a wat is B and how we calculate p total can u explain this formula or give book name i would be thanful to u