Table 7 Fitted model terms estimates mates together with t-values and p-value is presented.

From: Application of response surface methodology on the nanofluid flow over a rotating disk with autocatalytic chemical reaction and entropy generation optimization

Term

Estimate

Std

t-value

p-value

\({\varvec{C}}_{{{\varvec{fr}}}} {\mathbf{Re}}_{{\varvec{r}}}^{{{\mathbf{1/2}}}}\)

Intercept

0.03942

0.055792

0.7066

0.499894

A (\(\phi\))

0.11086

0.048317

2.2945

0.040909

B (M)

 − 0.09031

0.048317

 − 1.8692

0.098534

C (\(\omega\))

0.94430

0.048317

19.5439

 < 0.001

AB (\(\phi\) M)

 − 0.00364

0.068331

 − 0.0533

0.958788

AC (\(\phi\)\(\omega\))

 − 0.10694

0.068331

 − 1.565

0.156208

BC (M \(\omega\))

 − 0.04773

0.068331

 − 0.6985

0.504659

A2 (\(\phi\) 2)

0.09109

0.065422

1.3924

0.201281

B2(M2)

 − 0.08656

0.065422

 − 1.3231

0.222372

C2(\(\omega\) 2)

0.45103

0.065422

6.8942

 < 0.001

Term

Estimate

Std

Error

t

\({\varvec{C}}_{{{\varvec{g}}\theta \user2{*}}} {\mathbf{Re}}_{{\varvec{r}}}^{{{\mathbf{1/2}}}}\)

Intercept

 − 4.28430

0.005018

 − 853.758

 < 0.001

A (\(\phi\))

 − 0.28228

0.004346

 − 64.9541

 < 0.001

B (M)

 − 0.24130

0.004346

 − 55.5237

 < 0.001

C (\(\omega\))

 − 3.37140

0.004346

 − 775.772

 < 0.001

AB (\(\phi\) M)

 − 0.00999

0.006146

 − 1.6255

0.14272

AC (\(\phi\)\(\omega\))

 − 0.21980

0.006146

 − 35.7628

 < 0.001

BC (M \(\omega\))

 − 0.16585

0.006146

 − 26.9849

 < 0.001

A2 (\(\phi\) 2)

 − 0.01248

0.005884

 − 2.1203

 < 0.001

B2(M2)

0.00510

0.005884

0.867

0.41119

C2(\(\omega\) 2)

 − 0.13344

0.005884

 − 22.6773

 < 0.001

\({\varvec{Nu}}_{{\varvec{r}}} {\mathbf{Re}}_{{\varvec{r}}}^{{ - {\mathbf{1/2}}}}\)

Intercept

1.45550

0.000616

2362.915

 < 0.001

A (\(\phi\))

0.32216

0.000533

603.9211

 < 0.001

B (M)

 − 0.00928

0.000533

 − 17.3868

 < 0.001

C (\(\omega\))

0.05573

0.000533

104.4847

 < 0.001

AB (\(\phi\) M)

 − 0.00153

0.000754

 − 2.0214

0.001

AC (\(\phi\)\(\omega\))

0.00910

0.000754

12.0623

 < 0.001

BC (M \(\omega\))

 − 0.00513

0.000754

 − 6.7934

 < 0.001

A2 (\(\phi\) 2)

0.00992

0.000722

13.7409

 < 0.001

B2(M2)

0.00075

0.000722

1.0384

0.312

C2(\(\omega\) 2)

0.01682

0.000722

23.2938

 < 0.001