Can coefficient of drag value be as large as 14?

vasu · November 7, 2018, 08:40

Hi people,
I am new to Ansys Fluent, currently I am simulating the re-entry of a space module with following free stream conditions.

1. Inlet Mach number = 6
2. static pressure = 554.113 Pa
3. static temperature = 237.218 K

The data corresponds to atmospheric condition at an altitude of 35 km. The simulation I am doing is steady state. When residuals converge to value below 1e-03, I got coefficient of drag around 14. The reference conditions used for calculating the drag coefficient are:

1. Area = 1 m^2
2. Velocity = 1853.159 m/s

3. Density = 0.008137 kg/m^3

Can somebody tell me, is this value of drag coefficient is acceptable?

LuckyTran · November 7, 2018, 10:45

Is it right to use 1 m^2 for the reference area?

vasu · November 7, 2018, 12:10

Thank you sir! The area should be frontal area of the module.

November 7, 2018, 08:40	Can coefficient of drag value be as large as 14?	#1
vasu New Member Vasu S B Join Date: Sep 2017 Posts: 2 Rep Power: 0	Hi people, I am new to Ansys Fluent, currently I am simulating the re-entry of a space module with following free stream conditions. 1. Inlet Mach number = 6 2. static pressure = 554.113 Pa 3. static temperature = 237.218 K The data corresponds to atmospheric condition at an altitude of 35 km. The simulation I am doing is steady state. When residuals converge to value below 1e-03, I got coefficient of drag around 14. The reference conditions used for calculating the drag coefficient are: 1. Area = 1 m^2 2. Velocity = 1853.159 m/s 3. Density = 0.008137 kg/m^3 Can somebody tell me, is this value of drag coefficient is acceptable?

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Drag Coefficient for Ellipse Form (2D)	Ketut Utama	Main CFD Forum	8	December 11, 2014 12:03
Strange values in drag coefficient of a fuselage	Victor31	FLUENT	5	May 14, 2014 12:30
problem with saving drag coefficient	colopolo	FLUENT	5	April 12, 2013 11:59
Post Processing Drag Coefficient	squanto773	OpenFOAM Post-Processing	1	March 7, 2012 10:43
Plot drag coefficient against Y(distance)	edwin	FLUENT	0	February 4, 2008 10:41

November 7, 2018, 10:45		#2
LuckyTran Senior Member Lucky Join Date: Apr 2011 Location: Orlando, FL USA Posts: 5,754 Rep Power: 66	Is it right to use 1 m^2 for the reference area?

November 7, 2018, 12:10		#3
vasu New Member Vasu S B Join Date: Sep 2017 Posts: 2 Rep Power: 0	Thank you sir! The area should be frontal area of the module.