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| home_server:mswindows_notes [2024-03-14 Thu wk11 05:31] – [friction factor calculation] baumkp | home_server:mswindows_notes [2024-04-05 Fri wk14 05:38] (current) – [Excel Conditional Formatting Applies to Field Changing Unexpectedly] baumkp |
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| ====friction factor calculation==== | ====friction factor calculation==== |
| Earlier in my engineering career I used Lotus123 and MSExcel with iteration to calculate the friction factor of piping with Newtonian fluid according to the [[https://en.wikipedia.org/wiki/Darcy_friction_factor_formulae#Colebrook%E2%80%93White_equation|Darcy friction factor formulae]]. To remove the iteration from the spreadsheet I wrote a simple VB script that took care of this. When I get the change I will copy the script here. | Earlier in my engineering career I used Lotus123 and MSExcel with iteration to calculate the friction factor of piping with Newtonian fluid according to the [[https://en.wikipedia.org/wiki/Darcy_friction_factor_formulae#Colebrook%E2%80%93White_equation|Darcy friction factor formulae]]. To remove the iteration from the spreadsheet I wrote a simple VB script that took care of this. When I get the change I will copy the script here. |
| <code basic> | ++++VSBasic code for Colebrook Equation| |
| 'Public Re As Double 'Reynold number unitless 0<Re<10E9 | <code basic>'Public Re As Double 'Reynold number unitless 0<Re<10E9 |
| 'Public Rr As Double 'Relative Roughness unitless | 'Public Rr As Double 'Relative Roughness unitless |
| Public Ff As Double 'Friction Factor unitless | Public Ff As Double 'Friction Factor unitless |
| 'Static Function Log10(X) | 'Static Function Log10(X) |
| ' Log10 = Log(X) / Log(10#) | ' Log10 = Log(X) / Log(10#) |
| 'End Function | 'End Function</code>++++ |
| </code> | |
| As can be seen in the wiki page, [[https://en.wikipedia.org/wiki/Darcy_friction_factor_formulae#Colebrook%E2%80%93White_equation|Darcy friction factor formulae]], there are reasonably accurate equations that approximate the Colebrook equation that are available that do not require iterations to solve. I believe the VBscript is simpler and not an approximation..... | As can be seen in the wiki page, [[https://en.wikipedia.org/wiki/Darcy_friction_factor_formulae#Colebrook%E2%80%93White_equation|Darcy friction factor formulae]], there are reasonably accurate equations that approximate the Colebrook equation that are available that do not require iterations to solve. I believe the VBscript is simpler and not an approximation..... |
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| | ====Excel Conditional Formatting Applies to Field Changing Unexpectedly==== |
| | MSExcel unnecessarily and annoyingly changes conditional formatting ranges. |
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| | The options menu, advanced options, Editing options, unselect Extend data range formats and formulas reputedly stops this behavior. Unfortunately, it also stops the automatic copying of formula when inserting new rows or adding new lines to the bottom of an existing list. |
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| | References: |
| | *[[https://answers.microsoft.com/en-us/msoffice/forum/all/excel-conditional-formatting-applies-to-field/9fa1d051-0599-4763-9782-87dc118fbfa2|Excel Conditional Formatting Applies To Field Changing Unexpectedly]] |
| | *[[https://support.microsoft.com/en-us/office/advanced-options-33244b32-fe79-4579-91a6-48b3be0377c4|MSExcel Advanced Options Description]] |
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| ======MS Word====== | ======MS Word====== |