Welcome to the company ! we have many years of professional experience !

rsdzd@pyzyrsd.com
+86 13525609655

Established in 2001, Puyang Zhong Yuan Restar Petroleum Equipment Co.,Ltd, “RSD” for short, is Henan’s high-tech enterprise with intellectual property advantages and independent legal person qualification. With registered capital of RMB 50 million, the Company has two subsidiaries-Henan Restar Separation Equipment Technology Co., Ltd We are mainly specialized in R&D, production and service of various intelligent separation and control systems in oil&gas drilling,engineering environmental protection and mining industries.We always take the lead in Chinese market shares of drilling fluid shale shaker for many years. Our products have been exported more than 20 countries and always extensively praised by customers. We are Class I network supplier of Sinopec,CNPC and CNOOC and registered supplier of ONGC, OIL India,KOC. High quality and international standard products make us gain many Large-scale drilling fluids recycling systems for Saudi Aramco and Gazprom projects.

Certificate of Honor

patent for invention

patent for invention

patent for invention

patent for invention

patent for invention

concrete jungle

equivalent diameters hydraulic Dh and iso-kinetic Diso ...

Diameters equivalent ,hydraulic, diameters, diameters iso-kinetic. The dimensions of pipes or tubes of a ,hydraulic, system or ventilation are generally calculated according to the desired flowrate. The diameters of the ducts are usually the input parameter. For non-circular ducts, the oblong or rectangular section,we need to use the concepts of ...

Hydraulic diameter vs radius -- CFD Online Discussion Forums

5/8/2009, · I noticed this difference and realized that, hydraulic diameter, is main,ly used in close conduit,s, (pipes,, ann,ulus,, etc.) whereas, hydraulic radius is mainly used in open channel flows., In case, of pipe, considered as an open channel only half of the pipe perimeter enters into the definition of hydraulic radius.

Cat Head Bunting: What It Means And How To Respond | Vet ...

While ,head, bunting is a way many cats express trust and friendship, a ,cat, that doesn’t use this method is not a problem. It just means they show their affection in other ways. Watch for slow blinks, grooming or licking us, and cats who bring us gifts, such as rodents, toys, and insects.

Hydraulic Mean Depth Hydraulic Radius and Hydraulic Diameter

geometric radius but, Hydraulic diameter, is four times the, Hydraulic radius. Hydraulic Diameter, of Circle and Square For full flowing circular section (diameter d ), fortunately, diameter and...

Open Channel VS Pipe Flow - SlideShare

9/9/2018, · For flow of liquid with a free surface, the ,hydraulic radius, must be determined. This is the cross-sectional area of the channel divided by the wetted perimeter. For a semi-circular channel, it is half the ,radius,. For a rectangular channel, the ,hydraulic radius, is the cross-sectional area divided by the wetted perimeter.

Experimental Investigation of the Effect of Temperature on ...

According to API RP 13D, ,hydraulic radius, (HR) was used to represent annular geometry but, when flow regime changed from laminar to turbulent, experimental results did not match with theoretical results and started to be closer to friction pressure loss estimated by using slot flow approximation (SA) as shown in …

Fluid Flow

dh= ,Hydraulic diameter, = 4 (Across-section)/(Wetted perimeter) = Inside ,diameter, of pipe (D) for flow in a pipe = dio–doifor flow in an annulus (diois the inside ,diameter, of the outer pipe and doiis the outside ,diameter, of the inner pipe) For flow inside a pipe of ,diameter,, D: : Density of ,fluid, (kg/m3) u: Average velocity of ,fluid, (m/s)

Experimental Investigation of the Effect of Temperature on ...

Mostly known definitions are ,hydraulic diameter,, slot flow approximation (Bourgoyne Jr. et al., 1991), Lamb’s ,diameter, (Lamb, 1945) and Crittendon’s ,diameter, (Crittendon, 1959). Jensen and Sharma (1987) studied about finding the best combination of friction factor and equivalent ,diameter, definitions in order

Cat Head Print Ready 3D Model - RenderHub

Print ready ,cat head,.Measure units are millimeters, it is about 2.5 cm in height.Wall thickness for hollow version is about 1 mm.Mesh is manifold, no holes, no inverted faces, no bad contiguous edges.Here is two version of the model:1) C_H_Solid. (.blend, .fbx, .obj, .stl) The file contains a solid object. The model consists of 117258 triangular faces.2) C_H_Hollow.

Now You Can Make Everything Smell Like Cat Head Using This ...

It took 4 months and a lot of ,cat, sniffing, for scientific purposes, of course, for the ,head, of Yamamoto Perfumery, Mr. Yamamoto himself to replicate the smell. The spray costs about $10 and can be accompanied with a hand cream that not only smells like a ,cat, but can make your own paws oh so soft.

Hydraulic Diameter - Engineering ToolBox

As we could expect the hydraulic diameter of a standard circular tube or duct is the inner diameter or two times the, inner radius., Hydraulic Diameter of Circular Tube with Circular Tube on the Inside. The flow is in the volume between the inside and outside pipe.

Cat head blank | Etsy

Cat Head, Silhouette Clipart, ,Cat, Face Cutout for ,Cat, House Idea DIY, Black ,Cat, Silhouette Cricut SVG, Vector ,Cat Head, with Ears, ,Cat, ClprtShp. From shop ClprtShp. 5 out of 5 stars (3) 3 reviews $ 1.50. Favorite Add to Sale--5 pcs Headbands --Rose Red Cloth Covered ,Cat Head, Shape Headband 3mm Wide ...

Fluid Flow

dh= ,Hydraulic diameter, = 4 (Across-section)/(Wetted perimeter) = Inside ,diameter, of pipe (D) for flow in a pipe = dio–doifor flow in an annulus (diois the inside ,diameter, of the outer pipe and doiis the outside ,diameter, of the inner pipe) For flow inside a pipe of ,diameter,, D: : Density of fluid (kg/m3) u: Average velocity of fluid (m/s)

Liquid Flow in Soils (Hydrodynamics) – Soil Hydrology and ...

Eq. (62) may be simplified through definition of a “,hydraulic radius,”, which is the surface exposed to the wetting solution per unit volume of porous medium. The ,hydraulic radius,, R h, is related to the specific surface area (A v) and the porosity as: (3.69) Substitution of Eq.(63) into (62) yields an equivalent expression: (3.70)

What Causes Cat Head Pressing? - Catster

Cat head pressing, is something different altogether. Cats that engage in ,cat head pressing, press their heads against something — usually a wall or a piece of furniture, or in a veterinary ...

Hydraulic Diameter - Calculation Of Hydraulic Diameter of ...

For full-flowing circular section, geometric diameter and hydraulic diameter are the same., Hydraulic Radius ( RH) = A/P = π (d 2 /4) / πd = d/4,. Now, Hydraulic Diameter ( DH) = 4 RH = 4 * d/4 = d. So, hydraulic diameter is equal to geometric diameter in case of circular tube. ii) Hydraulic diameter of Square Tube:

Hydraulic Diameter of a Circular Tube or Duct

Hydraulic Radius Hydraulic radius, of a rectangular channel:, R h = b h / (b + 2 h) (1c), where R h = hydraulic radius (m, in) Hydraulic diameter

Hydraulic Diameter - Hydraulic diameter derivation _ Non ...

15/11/2018, · The, hydraulic diameter is calculated as 4 times, the, cross-sectional flow area divided by, the wetted perimeter, of the conduit/pipe,. where as,, Hydraulic Radius is calculated, as : The, hydraulic radius (), is often, used for systems with, free, surface flows,, such as water, in, open channels, streams or rivers.

CFD Online Discussion Forums - Hydraulic diameter vs radius

Re: ,Hydraulic diameter vs radius, I noticed this difference and realized that ,hydraulic diameter, is mainly used in close conduits (pipes, annulus, etc.) whereas ,hydraulic radius, is mainly used in open channel flows.

Open Channel Flow

Best ,Hydraulic, Cross Sections For any angleq,the most efficient cross section for uniform flow occurs when the ,hydraulic radius, is half the depth To find the correct depth y, these relations must be solved in conjunction with Manning’s flow-rate formula To find the best angleq, set dP/da=0, for constant A and y: For this angle, the best flow ...

Business cooperation

+86 13525609655

Company address

Road West, North Branch, Jingkai Road, Puyang City