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Old   October 22, 2004, 06:37
Default static pressure from mass flow rate
  #1
SAM
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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
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Old   October 22, 2004, 08:44
Default Re: static pressure from mass flow rate
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Leon
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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
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Old   October 22, 2004, 08:52
Default Re: static pressure from mass flow rate
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SAM
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but bernouli equaton, where does it contain mass flow rate term

confused

plz help
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Old   October 22, 2004, 09:49
Default Re: static pressure from mass flow rate
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Leon
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G {mass-flow rate }= B {constant, properties}* P_tot * function (P_tot, P_stat) * Area / sqrt ( R_gas * T_tot)
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Old   October 22, 2004, 10:23
Default Re: static pressure from mass flow rate
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SAM
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thanks i will try it and let u know

regards
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Old   October 22, 2004, 10:37
Default Re: static pressure from mass flow rate
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SAM
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wat is B and how we calculate p total

can u explain this formula or give book name

i would be thanful to u

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