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macro for nusselt number

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Old   April 10, 2008, 09:59
Default macro for nusselt number
  #1
prakash
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what is the utility is to be used to get the nusselt number for example F_V(f,ft) will give the velocity in y direction similarly what is the utility is to be used to get the nusselt number from fluent
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Old   April 11, 2008, 03:17
Default Re: macro for nusselt number
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red lemon
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define a custom field function for h*Dh/k where h is surf heat transfer co-eff from standard Fluent post
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Old   April 12, 2008, 08:06
Default Re: macro for nusselt number
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prakash
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Nu_fluent=BOUNDARY_HEAT_FLUX(f,ft)*x[0]/(k*NV_MAG(A)*(F_T(f,ft))-Tbulk));

is the equation which i got the inf to use but here what does boundary heat flux mean and what does it give

my model is a shell and tube heat exchanger so i need inner nusselt number and outer nusselt number values i need to extract from fluent and need to store these values in a file so what is the utility i should use to get nusselt number value
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Old   April 15, 2008, 00:35
Default Re: macro for nusselt number
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prakash
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pls let me know the how to get the utility for nusselt number asc wellas for heat transfer coefficient if any doubts reg my ques pls let me know
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