tag:blogger.com,1999:blog-28773952.post2997248692672210463..comments2017-08-10T19:55:47.594+05:30Comments on Chemical Professionals: How to Calculate Viscosity of Liquid Mixture?Technologisthttp://www.blogger.com/profile/06755052660465083010noreply@blogger.comBlogger25125tag:blogger.com,1999:blog-28773952.post-67458411890651825672015-01-25T00:12:36.763+05:302015-01-25T00:12:36.763+05:30regarding the 'ee' in the final step, is i...regarding the 'ee' in the final step, is it euler's number squared? Thanks.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-28773952.post-46122826263253696822014-04-19T15:04:44.898+05:302014-04-19T15:04:44.898+05:30Dear profmaster!
I have used this equation to calc...Dear profmaster!<br />I have used this equation to calculate but the calculated results compared with experiments is not the same. <br />Example 1: <br />Base oils 1: 73.5g - Viscosity at 40 ° C = 85.45 cSt<br /> 2: 25.5g - Viscosity at 40 ° C = 30.20 cSt<br />Additives 3: 1.0g - Viscosity at 40 ° C = 65.00 cSt<br />The result: 63.78 cSt <br />Measurement results: 68.10 cSt <br />Example 2: <br />Base oils 1: 72.6g - Viscosity at 40 ° C = 85.45 cSt<br /> 2: 16.0g - Viscosity at 40 ° C = 492.14 cSt<br />Additives 3: 3.9g - Viscosity at 40 ° C = 4100.00 cSt<br /> 4: 1.5g - Viscosity at 40 ° C = 650.00 cSt<br /> 5: 6.0g - Viscosity at 40 ° C = 12000.00 cSt<br />The result: 157.31 cSt <br />Measurement results: 175.74 cSt <br />Can you explain more help? You have a better calculation please help me! Thank! <br />Nguyen Hoang.Thuy Hoanghttps://www.blogger.com/profile/01647876661588643862noreply@blogger.comtag:blogger.com,1999:blog-28773952.post-53187202358299772062012-06-05T20:55:34.121+05:302012-06-05T20:55:34.121+05:30What do you mean by gas liquid mixture? Is it Gas ...What do you mean by gas liquid mixture? Is it Gas & liquid in a container or Gas dissolved in liquid or gas reacted with liquid?<br /><br />How do you define it?profmasterhttps://www.blogger.com/profile/06755052660465083010noreply@blogger.comtag:blogger.com,1999:blog-28773952.post-25838538756715456962012-06-05T11:22:40.810+05:302012-06-05T11:22:40.810+05:30how to find the viscosity of a liquid-gas mixture?...how to find the viscosity of a liquid-gas mixture??? very urgent please help!!!! thank youAnonymousnoreply@blogger.comtag:blogger.com,1999:blog-28773952.post-3625847301029637362012-04-24T10:16:26.652+05:302012-04-24T10:16:26.652+05:30How to calculate viscosity of reaction mass (pharm...How to calculate viscosity of reaction mass (pharmacueticals).pls helpAnonymousnoreply@blogger.comtag:blogger.com,1999:blog-28773952.post-19386977448100156362012-03-09T13:52:38.363+05:302012-03-09T13:52:38.363+05:30Shirley
Please check if you are using figures for ...Shirley<br />Please check if you are using figures for liquid or Gas.<br />I doubt you may be having figures for propylene & propane in gas form.profmasterhttps://www.blogger.com/profile/06755052660465083010noreply@blogger.comtag:blogger.com,1999:blog-28773952.post-70283619655475321722012-03-08T22:02:49.678+05:302012-03-08T22:02:49.678+05:30I need to calculate the viscosity for a liquid mix...I need to calculate the viscosity for a liquid mixture consisting of benzene, propylene and propane. First, we need to find the VBN for each component, right? But then, the problem I facing is that I cannot get the VBN value for propylene and propane. This is because when I substitute the kinematic viscosity (in cSt) into the first equation, it shows math error .<br />So, is there any other method to calculate the viscosity for the liquid mixture?<br />Thanks<br /><br />ShirleyAnonymousnoreply@blogger.comtag:blogger.com,1999:blog-28773952.post-69161158451797049012012-01-23T01:35:48.358+05:302012-01-23T01:35:48.358+05:30I too am trying to calculate the theoretical visco...I too am trying to calculate the theoretical viscosity at known temperatures using this formula. I have base oil, viscosity index improvers and additives. The formula above does not account for the latter two per ASTM method. Can anyone show me a formula that can?Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-28773952.post-17551117844407634102010-07-20T20:15:00.268+05:302010-07-20T20:15:00.268+05:30Is there a similar equation for rotational (dynami...Is there a similar equation for rotational (dynamic) viscosities? Or is that a lot more complicated? I'm only looking for an approximate answer.Olihttps://www.blogger.com/profile/18385284983781117371noreply@blogger.comtag:blogger.com,1999:blog-28773952.post-89264153459460824642009-03-18T10:06:00.000+05:302009-03-18T10:06:00.000+05:30Centipoise / Density = CentistokeCentipoise / Density = Centistokeprofmasterhttps://www.blogger.com/profile/06755052660465083010noreply@blogger.comtag:blogger.com,1999:blog-28773952.post-1035288244752636092009-03-17T16:17:00.000+05:302009-03-17T16:17:00.000+05:30how to convert the final viscosity value from cent...how to convert the final viscosity value from centistokes to centipoise?Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-28773952.post-77929239244326994422008-09-23T10:36:00.000+05:302008-09-23T10:36:00.000+05:30how we calculate viscosity for eahc liquid.ex: for...how we calculate viscosity for eahc liquid.ex: for ethnanol how we calculate viscosity at different temperatures?indiandollarhttps://www.blogger.com/profile/09949530888961300417noreply@blogger.comtag:blogger.com,1999:blog-28773952.post-86806732403593699182008-05-27T09:45:00.000+05:302008-05-27T09:45:00.000+05:30Have you tried sutherlands correction formula for ...Have you tried sutherlands correction formula for temperature. If not what is the value of coefficients based on sutherland formula & based on your experiments. <BR/><BR/>Use base temp as 30 or 40°C at which your coeff were matching. Correct these coeff for 100°C using sutherlands formula and compare with test results.<BR/><BR/>Also have you considered your VII as another blending liquid or not.<BR/>Probably this may help. Let me know your results.profmasterhttps://www.blogger.com/profile/06755052660465083010noreply@blogger.comtag:blogger.com,1999:blog-28773952.post-69086616474685010242008-05-27T02:36:00.000+05:302008-05-27T02:36:00.000+05:30You are right..I told you that unfortunately the c...You are right..<BR/><BR/>I told you that unfortunately the correction coefficients don't work in the presence of VII at 100°C becuase their value change using different amounts of VI improver (as determined by changing the coefficients untill to get the experimental viscosity value)making useless any prevision. <BR/><BR/>Moreover the coefficients change also changing the nature of the base (if moderately or severely hydrotreated)...<BR/><BR/>So I would like to know if there is an accurate model like a modified Refutas equation which can take in account all this evidence in order to make an accurate prevision of viscosity @100°C.<BR/><BR/>Looking forward from hearing to you soon,<BR/><BR/>I send you my best regards<BR/><BR/>Antonello LofùAnonymousnoreply@blogger.comtag:blogger.com,1999:blog-28773952.post-29020618703102766782008-05-26T21:19:00.000+05:302008-05-26T21:19:00.000+05:30The question is:correction coefficients fail at 10...The question is:<BR/><BR/>correction coefficients fail at 100°C because they seems to depend strongly on the amount of OCP used (I made this observation changing the value of correction coefficients in order to obtain the experimental viscosity value at different VII amount).<BR/>This change also changing the nature of the base (if strongly hydrotreated or less hydrotreated)<BR/><BR/>So their use seems to be completely useless.<BR/><BR/>Is it right? Or is there a modified REFUTAS equation I can use to solve this problem?<BR/><BR/>Sincerely yours.<BR/><BR/>Antonello LofùAnonymousnoreply@blogger.comtag:blogger.com,1999:blog-28773952.post-69783823418098114852008-05-26T17:54:00.000+05:302008-05-26T17:54:00.000+05:30As I wrote earlier I could not understand your las...As I wrote earlier I could not understand your last question. Can U pls elaborate it with ref to equations given in the post. This will help me in answering.profmasterhttps://www.blogger.com/profile/06755052660465083010noreply@blogger.comtag:blogger.com,1999:blog-28773952.post-5736663823868112322008-05-26T17:42:00.000+05:302008-05-26T17:42:00.000+05:30I'm sorry I forgot to write my nameI'm Antonello l...I'm sorry I forgot to write my name<BR/><BR/>I'm Antonello lofù and I need you can reply to my post about v@100 in the presence of VII<BR/><BR/>Antonello LofùAnonymousnoreply@blogger.comtag:blogger.com,1999:blog-28773952.post-83065117883802555422008-05-26T09:33:00.000+05:302008-05-26T09:33:00.000+05:30I could not understand your comment. Can you re-ph...I could not understand your comment. Can you re-phrase & elaborate more.profmasterhttps://www.blogger.com/profile/06755052660465083010noreply@blogger.comtag:blogger.com,1999:blog-28773952.post-19982328276189144472008-05-25T13:14:00.000+05:302008-05-25T13:14:00.000+05:30I'm still waiting for your replyI'm still waiting for your replyAnonymousnoreply@blogger.comtag:blogger.com,1999:blog-28773952.post-75544097516963773482008-05-18T16:48:00.000+05:302008-05-18T16:48:00.000+05:30I've tried to apply the correction coefficients bu...I've tried to apply the correction coefficients but the coefficients, differently from the behaviour @40°C, depend on the amount of VII used and on the nature of the base (if mineral or hydrocracked) so it's a little bit difficult the prevision.<BR/><BR/>Do you have more tricks to reveal?<BR/><BR/>Antonello LofùAnonymousnoreply@blogger.comtag:blogger.com,1999:blog-28773952.post-28251795269186021342008-05-16T09:29:00.000+05:302008-05-16T09:29:00.000+05:30Yes in that case you should go for correction coef...Yes in that case you should go for correction coefficients experimentally determined at 100°C.<BR/><BR/>VI improvers may behave differently than a conventional solution mix. Therefore, it is better to determine those coefficients practically.profmasterhttps://www.blogger.com/profile/06755052660465083010noreply@blogger.comtag:blogger.com,1999:blog-28773952.post-33589449684969106062008-05-16T03:54:00.000+05:302008-05-16T03:54:00.000+05:30I would like to know if the modified REFUTAS equat...I would like to know if the modified REFUTAS equation can be used in order to predict the v@100°C of oil bases containing viscosity index improvers in order to make me sure that the finshed product meets the SAE requirements.<BR/><BR/>I already use the REFUTAS for calculation @40°C using VI improvers and it works pretty well (using also correction coefficients for VI improvers determined by experiments) but at 100°C it doesn't work at all.<BR/><BR/>Can you suggest me a good text book for the modification of the equation for calculation @100°C?<BR/><BR/>Can I modify the equation using correction coefficients based on experimental determination in order to make it reliable for calculation @100°C?<BR/><BR/>Looking forward to hear from you soon.<BR/><BR/>Best regards<BR/><BR/>Antonio LofuAnonymousnoreply@blogger.comtag:blogger.com,1999:blog-28773952.post-12197349699828451802008-04-24T10:56:00.000+05:302008-04-24T10:56:00.000+05:30Yes Justin,Wt Fraction is Mass Fraction basically....Yes Justin,<BR/>Wt Fraction is Mass Fraction basically. You should use this equn in Cst & then convert to centipoise as they are two different units.<BR/><BR/>If we convert this equation in centi poise, it will not be usable for all general purpose due to different densities.profmasterhttps://www.blogger.com/profile/06755052660465083010noreply@blogger.comtag:blogger.com,1999:blog-28773952.post-12744859823978406172008-04-22T23:44:00.000+05:302008-04-22T23:44:00.000+05:30Also, what is the weight fraction? Is it the same ...Also, what is the weight fraction? Is it the same as the mass fraction? thanks <BR/>-JustinAnonymousnoreply@blogger.comtag:blogger.com,1999:blog-28773952.post-73270110182602507722008-04-22T23:23:00.000+05:302008-04-22T23:23:00.000+05:30How does equation 1 change if I want "v" to be in ...How does equation 1 change if I want "v" to be in centipoise? Thanks<BR/><BR/>-JustinAnonymousnoreply@blogger.com