3 replies to this topic

[madilaa]

From the book "Basic Principles and Calculation in Chemical Engineering" by David M. Himmelblau seventh edition, can someone please post me the solution for the question 10.6? The solution by Himmelblau himself is extremely confusing and I need a simplied version of the solution.

[kkala]

I suppose that few members have the 7th edition of the book; could you briefly express the question No 10.6, understanding and result of solution by Himmelblau, along with what is not clear? This may help both, you and some member able to help.

[Art Montemayor]

Madi:

Kkala is correct. Help us help you. YOU have to furnish the basic data; and the basic data in this case is the description of the problem and its proposed solution --- in detail. You seek an answer or explanation for your benefit; therefore it is up to you to furnish the upfront work effort and copy - even if you have to type out the entire data - all the material and submit it to the Forum. You also have to make an effort if you want help from others.

Our members can't be expected to possess all the editions of every engineering book published. We're doing this service for free; you have to help in this as well. The quantity and quality of your submittal will determine the quantity and quality of the Forum's response.

[kkala]

Expressing the problem (and matters relevant to it) in your own wording helps to understand it and concentrate in vague points. It is the "first step" in the road to solution. Not to say that you can even distinguish the solution in few cases.
By the way, a request to those of us making references to books or magazines. Of course these references are much better than nothing, but to access them can be quite laborious and costly. Not all of us reside in "easy" areas. It may be difficult (though not impossible in few cases) to present the results in brief. Nevertheless few characteristic words to briefly explain the content would help the reader judge whether it is worth while trying to access the book or article. This concerns either the OP (person making the query) or (more usual) the person responding to a query.
An example of such way of reference can be seen in Perry, 5th edition, on the following extract about water hammer.
.....If the time of flow stopage is somewhat longer than one pipe period τ, the pressure rise will not be so great as that given by Joukowsky equation, since part of the direct pressure waves will be cancelled by the reflected pressure waves. The actual pressure rise can be determined by use of Allievi equations or charts. See Angus, "Hydraulics for Engineers", 3rd ed., pp. 283-284, 291-292, Pitman, Toronto, 1943; Kerr and Strowger, A.S.M.E. - A.S.C.E. Symposium on Water Hammer, pp. 15-24, 1933; Rich, "Hydraulic Transients", pp. 24-27, McGraw-Hill, New York, 1951.
As you see, Perry avoids saying generalities, e.g. for a more complete water hammer estimate see Angus, "Hydraulics for Engineers", etc. Understandingly we cannot be always so precise though.

Note: My complain to Perry is that a handbook should make less references (especially "distant"), but that is another cup of tea.

Edited by kkala, 15 August 2012 - 02:19 AM.