[jamalf64]

Hi dear friends
What is reference erosion rate ( oka model) formula in fluent ?
Is below formula true?
E90 = 1e-09 * rho_w * K (Hv ^ k1)

[vinerm]

The generic formulation for reference erosion rate (from Oka's work) is



and is dependent on material pairs. Where did you get the relation you mentioned in your post?

[jamalf64]

Thanks for your reply
Is v inlet velocity?
Is D particle diameter?
I confused and I don't know how fluent calculate 0.000615 in below picture.
Can you describe a little more specific for me?

[vinerm]

Fluent does not calculate reference erosion rate. User needs to provide it. The default values are just hard-coded values and most likely correspond to hitting on either Copper or Steel.

is impact velocity of the particle and D is its diameter.

[jamalf64]

Originally Posted by vinerm

Fluent does not calculate reference erosion rate. User needs to provide it. The default values are just hard-coded values and most likely correspond to hitting on either Copper or Steel.

is impact velocity of the particle and D is its diameter.

Ok
Unfortunately I couldn't describe my question well.
A better question:
I know below formulas correspond to Sio2 and Aluminium. How can I set reference erosion rate?

[vinerm]

If you already know reference values, then just use those values in the formula. The formula that you have written is wrong. Look at my first post.

[jamalf64]

Originally Posted by vinerm

If you already know reference values, then just use those values in the formula. The formula that you have written is wrong. Look at my first post.

Thank you so much

[Lubo]

Originally Posted by jamalf64

Thanks for your reply
Is v inlet velocity?
Is D particle diameter?
I confused and I don't know how fluent calculate 0.000615 in below picture.
Can you describe a little more specific for me?

Hi dear friends
I spent a long time studying this Reference Erosion Rate，but I am still very confused.
If the Hv is 1.8，how is the default value of 0.000615 calculated？
I would like to know the detailed calculation formula and steps very much.
I am looking forward to your help, thank you!

[Lubo]

Originally Posted by jamalf64

Thanks for your reply
Is v inlet velocity?
Is D particle diameter?
I confused and I don't know how fluent calculate 0.000615 in below picture.
Can you describe a little more specific for me?

Originally Posted by vinerm

If you already know reference values, then just use those values in the formula. The formula that you have written is wrong. Look at my first post.

When E90 is calculated, the Up cannot be calculated when the particle hits the wall , so how to choose the Up value?

I cannot calculate the value of 0.000615 with the formula your first post and the default parameter (Hv=1.8Gpa) in Fluent.

and the E90 is equal to 84.714(Hv)^-0.79 * [(V_p/V')^k_2]*[(D_p/D')^k_3] maybe is right((see Ref. 1, equation 43 or Ref. 2, equation 14 for details).)

Can you describe a little more specific for me?

Ref. 1: Numerical investigation of mass loading effects on elbow erosion
http://www.sciencedirect.com/science...32591015004763

Ref. 2: Mitigating elbow erosion with a vortex chamber
http://www.sciencedirect.com/science...32591015301200

[Ahmad Veis]

Originally Posted by jamalf64

Thanks for your reply
Is v inlet velocity?
Is D particle diameter?
I confused and I don't know how fluent calculate 0.000615 in below picture.
Can you describe a little more specific for me?

Hello, good time Mr. Jamal
Did you understand through what formula the software reached the number 0.000615 for reference erosion!???

Thank you in advance

Ahmad Veis