Effect of flow rate variation on the frequency response in slot coating process with different upstream sloped die geometries

2015 ◽  
Vol 32 (7) ◽  
pp. 1218-1221 ◽  
Author(s):  
Won-Gi Ahn ◽  
Si Hyung Lee ◽  
Jaewook Nam ◽  
Hyun Wook Jung
Keyword(s):  
Frequency Response ◽  
Flow Rate ◽  
Rate Variation ◽  
Coating Process ◽  
Slot Coating

scholarly journals Cast Iron Cooling Rate Variation Using Cooling Channels: A Numerical Approach

2021 ◽  
pp. 29-35
Author(s):  
Olumide Adewole Towoju
Keyword(s):  
Mechanical Properties ◽  
Cast Iron ◽  
Cooling Rate ◽  
Flow Rate ◽  
Numerical Approach ◽  
Cooling Curve ◽  
Rate Variation ◽  
Cooling Fluid ◽  
Cooling Channels ◽  
The Impact

The cooling rate of molten cast iron can make or mar it. The cooling rate plays a significant role in the resulting mechanical properties of cast iron. It determines the grain growth and size. The mechanical properties of cast iron variation along its length are achieved either with the use of different mold materials or by sectioning to ensure varied cooling rates. Mechanical properties can, however, also be varied along its length without any of these adopted methods by the incorporation of cooling channels in the mould. This study seeks to expand the frontier of this concept with the use of different cooling fluids and fluid flow rate, and numerically investigate the impact on the cooling rate of gray cast iron (class 40). The cooling curve for the cast iron was impacted by the use of different cooling fluids with the attainment of the desired mechanical properties with the selection of an appropriate cooling fluid. Also, the flow rate of the cooling fluid has an impact on the cast iron cooling rate.

Theory of Self-Excited Coupled-Mode Vibration of Tainter Gates

2017 ◽  
pp. 463-497
Keyword(s):  
Flow Rate ◽  
Graphical Representation ◽  
Nodal Line ◽  
The Self ◽  
Rate Variation ◽  
Body Rotation ◽  
Coupled Mode ◽  
Bending Mode ◽  
Mode Vibration ◽  
Vibration Mechanism

In general, any mechanism that produces an unbalanced moment may also serve to initiate a rigid body rotation of a Tainter gate about the trunnion pin. From the modal analysis testing on an intact Folsom Dam Tainter gate, and an understanding of the concepts of flow-rate variation pressure and push-and-draw pressure presented in Chapters 4 and 5, respectively, a conceptual model of the vibration mechanism can be formulated. The whole gate rotation induces a flow-rate variation pressure and a coupled inertia torque on the skinplate, as presented in Chapter 4. Both the flow-rate-variation pressure and the inertia torque excite the skinplate to rotate in a bending mode shape about a horizontal nodal line. In the present chapter we will develop the theory behind such an instability mechanism, called the self-excited coupled-mode instability, culminating in the graphical representation of the Folsom Dam gate instability in terms of a dynamic stability criterion diagram under the conditions at which failure occurred.

Simultaneous Analysis of Die Internal and External Flows in Slot Coating Process

2019 ◽  
Vol 52 (3) ◽  
pp. 253-258
Author(s):  
Won-Gi Ahn ◽  
Si Hyung Lee ◽  
Jaewook Nam ◽  
Byoungjin Chun ◽  
Hyun Wook Jung
Keyword(s):  
Simultaneous Analysis ◽  
Coating Process ◽  
Slot Coating ◽  
External Flows

Dynamic Simulation of the Boron Isotopes Separation by Chemical Exchange Method

2012 ◽  
Vol 442 ◽  
pp. 62-66 ◽  
Author(s):  
Jin Cui ◽  
Wei Jiang Zhang ◽  
Feng Hai Miao
Keyword(s):  
Flow Rate ◽  
Chemical Exchange ◽  
Dynamic Change ◽  
Abundance Ratio ◽  
Enrichment Ratio ◽  
Boron Isotopes ◽  
Rate Variation ◽  
Feed Flow Rate ◽  
Exchange Method ◽  
Isotopes Separation

Abstract The enrichment ratio of 10B in the top and bottom component with the dynamic change of feed fluctuation and periodic wave on the separation process of the boron isotopes separation by chemical exchange method had been studied and a dynamic model was set up. The results indicate that when the feed amount is in the column load limit, the dynamic responses of top and bottom separation plate match well with the condition when feed flow rate is invariable. While when the exchange column is overloaded, the feed flow rate variation influences 10B abundance ratio greatly. With the increasing of the fluctuation period, the longer the wave period, the bigger the amplitude around the average line in top product. However, big increase of feed fluctuation will reduce the 10B abundance ratio of bottom product.

Influence of flow rate variation on the development of Escherichia coli biofilms

2013 ◽  
Vol 36 (11) ◽  
pp. 1787-1796 ◽  
Author(s):  
J. M. R. Moreira ◽  
J. S. Teodósio ◽  
F. C. Silva ◽  
M. Simões ◽  
L. F. Melo ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Flow Rate ◽  
Rate Variation
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