Portal field news

Portal field news

in ,

🎥 | Celebration / Oscar Award! This is the 5 5-star movie in May!

Photo (C) 2020 Coach Films UK Ltd. All Rights Reserved.

Celebration / Oscar award! This is the 5 5-star movie in May!

If you write the contents roughly
All the elements, such as the dense story composed of all 6 chapters and the hard action with atrocities, have been scaled up from the theatrical release version, and have reached the realm of mythology.

This month's five-star movie is Guy Ritchie's return to origin, a romantic love story, an Academy Award for Best Actor ... → Continue reading

 Cinema Today

Wikipedia related words

If there is no explanation, there is no corresponding item on Wikipedia.


Chemical engineeringInScale-upMeans to obtain the design standard to realize the same effect as the state of the small model device on the large actual machine.[1].

In order for the effect of the small machine and the large machine to be the same even if the scale is increased, some similarity is required, and for that purposeDimensionless numberIs used[2]..For example, in the case of:

Make the geometry of the small machine and the large machine the same, and keep all the dimensional ratios constant.
Mechanical similarity
To keep the flow state in the two devices, large and small, the sameReynolds numberandFroude numberMust be the same.Therefore
Must hold.heren TheNumber of rotations,d Is the size of the device, ρ is the liquiddensity, ΜViscosity, Subscripts 1 and 2 represent large and small devices, respectively.Than this
Therefore, as long as the same liquid is used for two large and small devices, mechanical similarity cannot be realized.
Power similarity
Rule of thumbAs a result, the same effect is maintained when the power applied per unit volume of the liquid is the same regardless of the size of the device.


  1. ^ Chemical Engineering SocietyEdited by "Chemical Engineering" (3rd edition) Maki Shoten, 2006, p. 275.ISBN 4-8375-0690-9. 
  2. ^ Mt. Ooyama Yoshinori "Chemical Engineering II" Iwanami Shoten, 1963 isbn = 4-00-021102-1, p. 213. 

Related item


Back to Top