chosing function based on problem

sanket2309 · January 29, 2020, 12:13

I have complex tubular assembly as shown. Fluid flows from internal path, so it will push the Mandrel (green part) towards right side. Some fluid will flow annular gap between Mandrel and restriction (pink part) and then it will force piston (sky colour) on left side.
Model: k-e
Fluid: Cement
Inlet B.C.: 79.5 kg/sec
Outlet B.C: 0 gauge pressure

My question is

1) Since I want to estimate net force acting on Mandrel (green part), which function (area, area-avg, mass-flow-avg, mass-avg etc , will give me near to exact value in CFX?. I want to make it as monitor point.

2) If I want to find erosion rate by cement flow on solids, what should be approach ?

Thanks.

Opaque · January 29, 2020, 15:44

In theory, from the available variables/functions, you should use

force_x()@Boundary of Interest
force_y()@Boundary of Interest
force_z()@Boundary of Interest

Anything else, it would be arranging/smearing the numbers to be something you expect.

January 29, 2020, 12:13	chosing function based on problem	#1
sanket2309 New Member SANKET BHATT Join Date: Nov 2019 Posts: 10 Rep Power: 6	I have complex tubular assembly as shown. Fluid flows from internal path, so it will push the Mandrel (green part) towards right side. Some fluid will flow annular gap between Mandrel and restriction (pink part) and then it will force piston (sky colour) on left side. Model: k-e Fluid: Cement Inlet B.C.: 79.5 kg/sec Outlet B.C: 0 gauge pressure My question is 1) Since I want to estimate net force acting on Mandrel (green part), which function (area, area-avg, mass-flow-avg, mass-avg etc , will give me near to exact value in CFX?. I want to make it as monitor point. 2) If I want to find erosion rate by cement flow on solids, what should be approach ? Thanks.

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January 29, 2020, 15:44		#2
Opaque Senior Member Join Date: Jun 2009 Posts: 1,799 Rep Power: 31	In theory, from the available variables/functions, you should use force_x()@Boundary of Interest force_y()@Boundary of Interest force_z()@Boundary of Interest Anything else, it would be arranging/smearing the numbers to be something you expect.