Physics Help Forum Fluid mechanics problem

 Jul 2nd 2014, 12:54 AM #1 Junior Member   Join Date: Jul 2014 Posts: 5 Fluid mechanics problem Hello everyone, I have a current problem I need help with (attached below). I'm not a mechanical engineer by any means so if you guys could kindly point me in the right direction, that would be a huge lifesaver! Thanks! Attached Thumbnails
Jul 2nd 2014, 08:31 AM   #2

Join Date: Apr 2008
Location: On the dance floor, baby!
Posts: 2,818
 Originally Posted by asmpic Hello everyone, I have a current problem I need help with (attached below). I'm not a mechanical engineer by any means so if you guys could kindly point me in the right direction, that would be a huge lifesaver! Thanks!
I presume you are trying to find an ensemble average? I'm not going to type out the LaTeX, just simply say this:

The ensemble average if a property P is equal to
(Integral) A exp[] dv
Or whatever v may be in your problem.

Without you showing work I have no clue how to help you more.

-Dan
__________________
Do not meddle in the affairs of dragons for you are crunchy and taste good with ketchup.

See the forum rules here.

Jul 3rd 2014, 04:15 AM   #3
Junior Member

Join Date: Jul 2014
Posts: 5
 Originally Posted by topsquark I presume you are trying to find an ensemble average? I'm not going to type out the LaTeX, just simply say this: The ensemble average if a property P is equal to (Integral) A exp[] dv Or whatever v may be in your problem. Without you showing work I have no clue how to help you more. -Dan

Thanks for the quick reply. Actually, I think I need to find mean energy

So, would I "simply" take the integral of (1/2)m*(v_x)^2 * f(v) dv_x, from +/- infinity?

Sorry, I don't know how to do the latex on this forum yet.

Last edited by asmpic; Jul 3rd 2014 at 04:30 AM.

Jul 3rd 2014, 09:55 PM   #4

Join Date: Apr 2008
Location: On the dance floor, baby!
Posts: 2,818
 Originally Posted by asmpic Thanks for the quick reply. Actually, I think I need to find mean energy So, would I "simply" take the integral of (1/2)m*(v_x)^2 * f(v) dv_x, from +/- infinity? Sorry, I don't know how to do the latex on this forum yet.
No problems. And yes, that's what you need to do.

-Dan
__________________
Do not meddle in the affairs of dragons for you are crunchy and taste good with ketchup.

See the forum rules here.

 Tags fluid, mechanics, problem

 Thread Tools Display Modes Linear Mode

 Similar Physics Forum Discussions Thread Thread Starter Forum Replies Last Post Humam Thermodynamics and Fluid Mechanics 3 May 13th 2014 01:45 PM beng Advanced Mechanics 2 Feb 22nd 2014 04:38 PM PMB35 Thermodynamics and Fluid Mechanics 0 Apr 6th 2013 03:40 AM Kbotz Advanced Mechanics 4 May 24th 2010 11:12 PM mchulst Thermodynamics and Fluid Mechanics 1 Nov 21st 2008 05:49 PM
{"extraction_info": {"found_math": false, "script_math_tex": 0, "script_math_asciimath": 0, "math_annotations": 0, "math_alttext": 0, "mathml": 0, "mathjax_tag": 0, "mathjax_inline_tex": 0, "mathjax_display_tex": 0, "mathjax_asciimath": 0, "img_math": 0, "codecogs_latex": 0, "wp_latex": 0, "mimetex.cgi": 0, "/images/math/codecogs": 0, "mathtex.cgi": 0, "katex": 0, "math-container": 0, "wp-katex-eq": 0, "align": 0, "equation": 0, "x-ck12": 0, "texerror": 0, "math_score": 0.8217415809631348, "perplexity": 2730.296415134489}, "config": {"markdown_headings": true, "markdown_code": true, "boilerplate_config": {"ratio_threshold": 0.18, "absolute_threshold": 10, "end_threshold": 15, "enable": true}, "remove_buttons": true, "remove_image_figures": true, "remove_link_clusters": true, "table_config": {"min_rows": 2, "min_cols": 3, "format": "plain"}, "remove_chinese": true, "remove_edit_buttons": true, "extract_latex": true}, "warc_path": "s3://commoncrawl/crawl-data/CC-MAIN-2019-39/segments/1568514576355.92/warc/CC-MAIN-20190923105314-20190923131314-00497.warc.gz"}